If O (origin) is a point inside the triangle PQR such that $\overline{\mathrm{OP}}+{\mathrm{k}}_1\overline{\mathrm{OQ}}+{\mathrm{k}}_2\overline{\mathrm{OR}}=\overline{0}$ where ${\mathrm{k}}_1\mathrm{and} {\mathrm{k}}_2$ are constants such that $\frac{\mathrm{Area}\mathrm{of} \mathrm{triangle} \mathrm{PQR}}{\mathrm{Area} \mathrm{of} \mathrm{triangle} \mathrm{OQR}}=4$ then the positive value of ${\mathrm{k}}_1+{\mathrm{k}}_2=$______