Select the number from among the given options that can replace the question mark (?) in the following series.

26, 78, 36, 108 ,66, 198, ?

Given: 26, 78, 36, 108 ,66, 198, ?

In the given series there are  two series

Series I : 26, 36 , 66, ?

Series II: 78, 108, 198

Logic: In series I +10, +30,+90

In series II +30, +90 , +270

26 + 10 = 36

36+30 = 66