If a/b = 19/3, b/c = 15/26, c/d = 13/19, e/f = 7/117 and d/e = 19/25 then what is the value of ( abc/def )*5?

Question

If
a/b = 21/34;
b/c = 121/120;
c/d = 17/77;
e/f = 11/15
and
d/e = 14/17
then what is the value of
(abc/def)*2?

Answer 1

7/60

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a/b = 19/3 --->(1)
b/c = 15/26 --->(2)
c/d = 13/19 --->(3)
e/f = 7/117 --->(4)
d/e = 19/25 --->(5)
(abc/def)*5=x

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(1)* (2)* (3)=a/d---> (6)
(2)* (3)* (5)=b/e---> (7)
(3)* (4)* (5)=c/f---> (8)
(6)* (7)* (8)=abc/def ==> x=5*19/3*15/26*15/26*13/19*13/19*13/19*7/117*19/25*19/25=7/60
x=7/60