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Finding the Fourth Proportional to 99,209.20, 148,468.20 and 68,105.20

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Solution

The fourth proportional to 99,209.20, 148,468.20 and 68,105.20 is: 101,920.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,209.20 : 148,468.20 = 68,105.20 : x
  2. Step 2: Convert to fraction form
    99,209.20/148,468.20 = 68,105.20/x
  3. Step 3: Cross multiply
    99,209.20x = 148,468.20 × 68,105.20
  4. Step 4: Simplify right side
    99,209.20x = 10,111,456,454.64
  5. Step 5: Solve for x
    x = 10,111,456,454.64/99,209.20
  6. Step 6: Final answer
    x = 101,920.55

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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.