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If a: b = (2)/(9) : (1)/(3) , b: c = ...

If ` a: b = (2)/(9) : (1)/(3) , b: c = (2)/(7) : (5)/(14) and d : c = ( 7)/(10) : (3)/(5) , ` then find a : b: c: d .

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16 : 24 : 30 : 35
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