The long piece is 4 times the length of the short piece.
Short piece = 1 time
Long piece = 4 times
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Full rope = 5 times
5 times = 70 inches
Divide each side by 5 : 1 time = 14 inches
Short piece = 1 time = 14 inches
Long piece = 4 times = 4 x 14inches = 56 inches
Check:
Ratio of long to short = 56inches / 14inches = 4
Sum of both pieces = (56 + 14) = 70 inches
yay !