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Finding the Fourth Proportional to 138,658.40, 207,669.02 and 88,053.71

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Solution

The fourth proportional to 138,658.40, 207,669.02 and 88,053.71 is: 131,878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,658.40 : 207,669.02 = 88,053.71 : x
  2. Step 2: Convert to fraction form
    138,658.40/207,669.02 = 88,053.71/x
  3. Step 3: Cross multiply
    138,658.40x = 207,669.02 × 88,053.71
  4. Step 4: Simplify right side
    138,658.40x = 18,286,027,663.06
  5. Step 5: Solve for x
    x = 18,286,027,663.06/138,658.40
  6. Step 6: Final answer
    x = 131,878.26

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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.