What is the Republican seat plurality of the state with a ratio of 12/4 Republicans to Democrats?
CREATE TABLE "partisan_mix_of_the_house_by_state" (
  "state_ranked_in_partisan_order" text,
  "percentage_republicans" text,
  "percentage_democrats" text,
  "republican_democratic" text,
  "republican_seat_plurality" text
);
SELECT "republican_seat_plurality" FROM "partisan_mix_of_the_house_by_state" WHERE "republican_democratic"='12/4';