Let the incomes of P, Q, and R be 6x, 8x, and 11x, respectively,
and their expenditures be 5y, 8y, and 12y, respectively.
Therefore,
their savings are (6x - 5y), (8x - 8y), and (11x - 12y), respectively.
If we set the ratio of x to y equal to 10/9,
we can determine the ratio of the savings of P to Q and Q to R.
The ratio of the savings of P to Q is 15/8,
and the ratio of the savings of Q to R is 8/2.
The overall ratio of the savings of P, Q, and R is 15:8:2.