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Finding the Fourth Proportional to 99,151.20, 148,726.78 and 25,279.20

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Solution

The fourth proportional to 99,151.20, 148,726.78 and 25,279.20 is: 37,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,151.20 : 148,726.78 = 25,279.20 : x
  2. Step 2: Convert to fraction form
    99,151.20/148,726.78 = 25,279.20/x
  3. Step 3: Cross multiply
    99,151.20x = 148,726.78 × 25,279.20
  4. Step 4: Simplify right side
    99,151.20x = 3,759,694,016.98
  5. Step 5: Solve for x
    x = 3,759,694,016.98/99,151.20
  6. Step 6: Final answer
    x = 37,918.79

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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.