Finding the Fourth Proportional to 138,238,642.20, 207,356,543.07 and 79,909,205.49
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Solution
The fourth proportional to 138,238,642.20, 207,356,543.07 and 79,909,205.49 is: 119,862,987.27
Step by Step Solution
- Step 1: Write the proportion equation
138,238,642.20 : 207,356,543.07 = 79,909,205.49 : x - Step 2: Convert to fraction form
138,238,642.20/207,356,543.07 = 79,909,205.49/x - Step 3: Cross multiply
138,238,642.20x = 207,356,543.07 × 79,909,205.49 - Step 4: Simplify right side
138,238,642.20x = 16,569,696,609,876,664 - Step 5: Solve for x
x = 16,569,696,609,876,664/138,238,642.20 - Step 6: Final answer
x = 119,862,987.27
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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.