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Because you weigh more therefore you are pulling more weight as a pullup is pulling your entire body weight. when you were 12 you weighed 30 lbs less hence why pullups were easier. Bench press does not involve your bodyweight and your chest, triceps and shoulder muscles are probably stronger now.

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Q: You are 13 when you were 12 you could do 50 pushups and bench press 100 lbs and you weighed 90 lbs now you can only do 30 pushups but you can bench press 130 lbs and you weight 120 lbs why is thisim n?
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Am I strong for a 14 year old I am 5-5 109 pounds and bench 185-76 pounds over my body weight?

Yes. Very special. Don't lose your build. Do lots of pushups. Wide pushups, close pushups, triangle pushups, and crab pushups. Don't forget to use your joint and keep them fluid and stretched out. You will get stiff and get bad joints if you don't.

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Do some pushups and pullups to warm up with a light jog to get your heart rate going. bench press, leg press, and squats will help develop your chest as well as thighs.

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work out your arms: curls ,forarms work out your chest: bench, pushups work out core: sit ups, dips and planks to get that V shape

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You need to focus on exercises like bench pressing and fly lifting. Also, if weight machines are not handy, you should be aware that pushups are a good chest exercise if no machines are available.

Do you know a Weight bench workout?

I use a dumbells and weight bench ONLY routine.

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The York fitness bench can withstand a large a mount of weight. When in the bench press position it can withstand up to four-hundred pounds of weight.

Is a bench press an isometric exercise?

No, calisthenics involve working out with ones body weight, such as pull ups, pushups, etc. Isometric exercises involve no movement and staying in a static position.

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