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Finding the Fourth Proportional to 148,758.48, 205,293.96 and 81,691.92

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Solution

The fourth proportional to 148,758.48, 205,293.96 and 81,691.92 is: 112,738.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,758.48 : 205,293.96 = 81,691.92 : x
  2. Step 2: Convert to fraction form
    148,758.48/205,293.96 = 81,691.92/x
  3. Step 3: Cross multiply
    148,758.48x = 205,293.96 × 81,691.92
  4. Step 4: Simplify right side
    148,758.48x = 16,770,857,756.80
  5. Step 5: Solve for x
    x = 16,770,857,756.80/148,758.48
  6. Step 6: Final answer
    x = 112,738.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.