Finding the Fourth Proportional to 138,397.80, 207,564.84 and 54,159.96
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Solution
The fourth proportional to 138,397.80, 207,564.84 and 54,159.96 is: 81,227.47
Step by Step Solution
- Step 1: Write the proportion equation
138,397.80 : 207,564.84 = 54,159.96 : x - Step 2: Convert to fraction form
138,397.80/207,564.84 = 54,159.96/x - Step 3: Cross multiply
138,397.80x = 207,564.84 × 54,159.96 - Step 4: Simplify right side
138,397.80x = 11,241,703,431.81 - Step 5: Solve for x
x = 11,241,703,431.81/138,397.80 - Step 6: Final answer
x = 81,227.47
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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.