Home / 123,021.20-169,781.82-75,306.08

Finding the Fourth Proportional to 123,021.20, 169,781.82 and 75,306.08

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Solution

The fourth proportional to 123,021.20, 169,781.82 and 75,306.08 is: 103,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,021.20 : 169,781.82 = 75,306.08 : x
  2. Step 2: Convert to fraction form
    123,021.20/169,781.82 = 75,306.08/x
  3. Step 3: Cross multiply
    123,021.20x = 169,781.82 × 75,306.08
  4. Step 4: Simplify right side
    123,021.20x = 12,785,603,319.47
  5. Step 5: Solve for x
    x = 12,785,603,319.47/123,021.20
  6. Step 6: Final answer
    x = 103,930.08

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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.