Abungee jumper falls 97.2 feet before bouncing back up at the end of his bungee cord. then he falls 64.8 feet before bouncing up again. on his third descent, he falls 43.2 feet before going back up. what is the total distance the bungee jumper drops after five falls if the distances continue in this pattern? (do not include the distance traveled up.)

The difference between jump 1 and jump 2 is 32.4 and the difference between jump 2 and jump 3 is 21.6, which is 2/3 of the first difference. So the difference between jump 3 and jump 4 should be 14.4 and the difference between jump 4 and 5 should be 9.6.  That makes jump 4 28.8 ft and jump 5 19.2 ft.  So we want only the total amount the jumper "falls" so that is 97.2+64.8+43.2+28.8+19.2=253.2.