Jon caught four fish that weighed a total of 252 pounds. The kingfish weighed twice as much as the amberjack and the white marlin weighed twice as much as the kingfish. The weight of the tarpon was 5 times the weight of the amberjack. How much did each fish weigh?

1 Amberjack

Kingfish equals 2 Amberjacks

Marlin equals 2 Kingfish or 4 Amberjacks

Tarpon equals 5 AmberJacks

So:

1A plus 2A plus 4A plus 5A equals the 252.

(where A is weight of the AmberJack).

Therefore:

12A equals 252, and A is 21. (252/12 = 21)

Then:

The Amberjack is 21Ibs.

The Kingfish (twice as much as A) is 42Ibs.

The Marlin (four times A) is 84Ibs.

And the Tarpon (five times A) is 105Ibs.

To Check:

21 + 42 + 84 + 105 = 252