Finding the Fourth Proportional to 85,915,689.36, 128,703,472.10 and 75,145,151.76
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Solution
The fourth proportional to 85,915,689.36, 128,703,472.10 and 75,145,151.76 is: 112,568,984.95
Step by Step Solution
- Step 1: Write the proportion equation
85,915,689.36 : 128,703,472.10 = 75,145,151.76 : x - Step 2: Convert to fraction form
85,915,689.36/128,703,472.10 = 75,145,151.76/x - Step 3: Cross multiply
85,915,689.36x = 128,703,472.10 × 75,145,151.76 - Step 4: Simplify right side
85,915,689.36x = 9,671,441,942,617,700 - Step 5: Solve for x
x = 9,671,441,942,617,700/85,915,689.36 - Step 6: Final answer
x = 112,568,984.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.