Finding the Fourth Proportional to 138,572.03, 191,229.68 and 74,909.82
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Solution
The fourth proportional to 138,572.03, 191,229.68 and 74,909.82 is: 103,375.70
Step by Step Solution
- Step 1: Write the proportion equation
138,572.03 : 191,229.68 = 74,909.82 : x - Step 2: Convert to fraction form
138,572.03/191,229.68 = 74,909.82/x - Step 3: Cross multiply
138,572.03x = 191,229.68 × 74,909.82 - Step 4: Simplify right side
138,572.03x = 14,324,980,532.91 - Step 5: Solve for x
x = 14,324,980,532.91/138,572.03 - Step 6: Final answer
x = 103,375.70
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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.