The series follows a pattern where each term is multiplied by 10 and then reduced by a specific number. To get from 30 to 200, you multiply by 10 and subtract 100, followed by multiplying by 10 and subtracting 10 repeatedly for the subsequent terms. Applying this to 188900, you multiply by 10 to get 1889000 and subtract 100, which results in 1888900.