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Finding the Fourth Proportional to 99,287.20, 148,930.80 and 89,456.80

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Solution

The fourth proportional to 99,287.20, 148,930.80 and 89,456.80 is: 134,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,287.20 : 148,930.80 = 89,456.80 : x
  2. Step 2: Convert to fraction form
    99,287.20/148,930.80 = 89,456.80/x
  3. Step 3: Cross multiply
    99,287.20x = 148,930.80 × 89,456.80
  4. Step 4: Simplify right side
    99,287.20x = 13,322,872,789.44
  5. Step 5: Solve for x
    x = 13,322,872,789.44/99,287.20
  6. Step 6: Final answer
    x = 134,185.20

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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.