Finding the Fourth Proportional to 168,143,928.18, 231,832,471.55 and 138,270,177.95
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Solution
The fourth proportional to 168,143,928.18, 231,832,471.55 and 138,270,177.95 is: 190,643,322.32
Step by Step Solution
- Step 1: Write the proportion equation
168,143,928.18 : 231,832,471.55 = 138,270,177.95 : x - Step 2: Convert to fraction form
168,143,928.18/231,832,471.55 = 138,270,177.95/x - Step 3: Cross multiply
168,143,928.18x = 231,832,471.55 × 138,270,177.95 - Step 4: Simplify right side
168,143,928.18x = 32,055,517,095,806,812 - Step 5: Solve for x
x = 32,055,517,095,806,812/168,143,928.18 - Step 6: Final answer
x = 190,643,322.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.