egafd.com

Assuming the same power-to-weight ratio, I'm going to be like the careless murderer and take a stab in the dark here :-

Answer - considerably less than 2.5 feet if the flea weighed 100 times more and had 100 times the jumping power. I'm saying 0.003 inches ( 3 thousandths of an inch ).

And I cant begin to imagine your good lady wife's reaction when you pull her knickers off mumbling something about fleas!

It's gotta be a trick question!

There are too many variables. The legs will be more powerful, but that power will be cancelled out by the extra weight, and air resistance when travelling through the air.

It would be like Jo Brand trying to pole vault !

Is it using a trampoline?

You say the flea is 100 times bigger.

Is that 100 times taller, 100 times wider, 100 times longer, or all three?

If all three, then everytime the flea doubles in size, it's weight increases by eight. That means the 100 times bigger flea would be 1 million times heavier!

It could not jump at all.

Is the correct answer 2.5 feet, by any chance?

Can I see a picture of your wife before I answer correctly.....