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Finding the Fourth Proportional to 99,370.66, 149,019.92 and 54,425.40

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Solution

The fourth proportional to 99,370.66, 149,019.92 and 54,425.40 is: 81,618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,370.66 : 149,019.92 = 54,425.40 : x
  2. Step 2: Convert to fraction form
    99,370.66/149,019.92 = 54,425.40/x
  3. Step 3: Cross multiply
    99,370.66x = 149,019.92 × 54,425.40
  4. Step 4: Simplify right side
    99,370.66x = 8,110,468,753.97
  5. Step 5: Solve for x
    x = 8,110,468,753.97/99,370.66
  6. Step 6: Final answer
    x = 81,618.34

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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.