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Finding the Fourth Proportional to 99,308.80, 148,963.20 and 63,879.40

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Solution

The fourth proportional to 99,308.80, 148,963.20 and 63,879.40 is: 95,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,308.80 : 148,963.20 = 63,879.40 : x
  2. Step 2: Convert to fraction form
    99,308.80/148,963.20 = 63,879.40/x
  3. Step 3: Cross multiply
    99,308.80x = 148,963.20 × 63,879.40
  4. Step 4: Simplify right side
    99,308.80x = 9,515,679,838.08
  5. Step 5: Solve for x
    x = 9,515,679,838.08/99,308.80
  6. Step 6: Final answer
    x = 95,819.10

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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.