Just some stats to help a bit...
Germany: 65,058,00 population; $237 billion / $3,648 (1913) and Russian Empire: 156,192,000 population ; $232 billion / $1,488 (1913)
Germany had an industrial output of 138, Russia 77
Russian 1913 TFR: 7 German 1913 TFR: 3.5