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Finding the Fourth Proportional to 131,155.92, 196,753.20 and 42,379.92

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Solution

The fourth proportional to 131,155.92, 196,753.20 and 42,379.92 is: 63,576.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,155.92 : 196,753.20 = 42,379.92 : x
  2. Step 2: Convert to fraction form
    131,155.92/196,753.20 = 42,379.92/x
  3. Step 3: Cross multiply
    131,155.92x = 196,753.20 × 42,379.92
  4. Step 4: Simplify right side
    131,155.92x = 8,338,384,875.74
  5. Step 5: Solve for x
    x = 8,338,384,875.74/131,155.92
  6. Step 6: Final answer
    x = 63,576.12

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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.