Home / 100,545.49-138,755.69-57,531.97

Finding the Fourth Proportional to 100,545.49, 138,755.69 and 57,531.97

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Solution

The fourth proportional to 100,545.49, 138,755.69 and 57,531.97 is: 79,395.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,545.49 : 138,755.69 = 57,531.97 : x
  2. Step 2: Convert to fraction form
    100,545.49/138,755.69 = 57,531.97/x
  3. Step 3: Cross multiply
    100,545.49x = 138,755.69 × 57,531.97
  4. Step 4: Simplify right side
    100,545.49x = 7,982,888,194.41
  5. Step 5: Solve for x
    x = 7,982,888,194.41/100,545.49
  6. Step 6: Final answer
    x = 79,395.79

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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.