a : b = 2: 3, b : c = 4: 9, c : d = 12: 7 అయితే a : b : c : d = ?

1
13 : 28 : 64 : 95
2
12 : 27 : 68 : 94
3
32 : 48 : 108 : 63 
4
19 : 25 : 48 : 94

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