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Finding the Fourth Proportional to 99,127.68, 148,839.13 and 40,078.68

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Solution

The fourth proportional to 99,127.68, 148,839.13 and 40,078.68 is: 60,177.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,127.68 : 148,839.13 = 40,078.68 : x
  2. Step 2: Convert to fraction form
    99,127.68/148,839.13 = 40,078.68/x
  3. Step 3: Cross multiply
    99,127.68x = 148,839.13 × 40,078.68
  4. Step 4: Simplify right side
    99,127.68x = 5,965,275,354.70
  5. Step 5: Solve for x
    x = 5,965,275,354.70/99,127.68
  6. Step 6: Final answer
    x = 60,177.70

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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.