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If `a/b=c/d=e/f,` then show that `(a^(3)b+2c^(2)e-3ae^(2)f)/(b^(4)+2d^(2)f-3bf^(3))=(ace)/(bdf)`(wherever defined)

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If `a/b=c/d=e/f,` then show that `(a^(3)b+2c^(2)e-3ae^(2)f)/(b^(4)+2d^(2)f-3bf^(3))=(ace)/(bdf)`(wherever defined)
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`a/b=c/d=e/f=krArra=bk, c=dk, e=fk`
`:.(a^(3)b+2c^(2)e-3ae^(2)f)/(b^(4)+2d^(2)f-3bf^(3))=(k^(3)(b^(4)+2d^(2)f-3df^(3)))/(b^(4)+2d^(2)f-3bf^(3))=k^(3)=(ace)/(bdf)`
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