Finding the Fourth Proportional to 100,135.17, 138,186.42 and 54,812.73
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Solution
The fourth proportional to 100,135.17, 138,186.42 and 54,812.73 is: 75,641.50
Step by Step Solution
- Step 1: Write the proportion equation
100,135.17 : 138,186.42 = 54,812.73 : x - Step 2: Convert to fraction form
100,135.17/138,186.42 = 54,812.73/x - Step 3: Cross multiply
100,135.17x = 138,186.42 × 54,812.73 - Step 4: Simplify right side
100,135.17x = 7,574,374,929.13 - Step 5: Solve for x
x = 7,574,374,929.13/100,135.17 - Step 6: Final answer
x = 75,641.50
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1.5x scale
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.