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Finding the Fourth Proportional to 423,658.78, 635,575.65 and 124,149.13

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Solution

The fourth proportional to 423,658.78, 635,575.65 and 124,149.13 is: 186,249.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,658.78 : 635,575.65 = 124,149.13 : x
  2. Step 2: Convert to fraction form
    423,658.78/635,575.65 = 124,149.13/x
  3. Step 3: Cross multiply
    423,658.78x = 635,575.65 × 124,149.13
  4. Step 4: Simplify right side
    423,658.78x = 78,906,163,996.68
  5. Step 5: Solve for x
    x = 78,906,163,996.68/423,658.78
  6. Step 6: Final answer
    x = 186,249.33

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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.