Finding the Fourth Proportional to 143,653,537.80, 215,480,306.70 and 86,257,909.80
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Solution
The fourth proportional to 143,653,537.80, 215,480,306.70 and 86,257,909.80 is: 129,386,864.70
Step by Step Solution
- Step 1: Write the proportion equation
143,653,537.80 : 215,480,306.70 = 86,257,909.80 : x - Step 2: Convert to fraction form
143,653,537.80/215,480,306.70 = 86,257,909.80/x - Step 3: Cross multiply
143,653,537.80x = 215,480,306.70 × 86,257,909.80 - Step 4: Simplify right side
143,653,537.80x = 18,586,880,859,004,932 - Step 5: Solve for x
x = 18,586,880,859,004,932/143,653,537.80 - Step 6: Final answer
x = 129,386,864.70
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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.