Finding the Fourth Proportional to 100,305.74, 138,426.17 and 57,292.31
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Solution
The fourth proportional to 100,305.74, 138,426.17 and 57,292.31 is: 79,065.81
Step by Step Solution
- Step 1: Write the proportion equation
100,305.74 : 138,426.17 = 57,292.31 : x - Step 2: Convert to fraction form
100,305.74/138,426.17 = 57,292.31/x - Step 3: Cross multiply
100,305.74x = 138,426.17 × 57,292.31 - Step 4: Simplify right side
100,305.74x = 7,930,755,103.36 - Step 5: Solve for x
x = 7,930,755,103.36/100,305.74 - Step 6: Final answer
x = 79,065.81
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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.