52 ∶ 91 : : 72 ∶ ?

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52 ∶ 91 : : 72 ∶ ?

A138

B109

C98

D126

Answer:

52 ∶ 91 → = (13 × 4) : (13 × 7) 72 ∶ ? → = (18 × 4) : (18 × 7) = 72 : 126.

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