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Finding the Fourth Proportional to 131,309.92, 181,209.84 and 71,693.92

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Solution

The fourth proportional to 131,309.92, 181,209.84 and 71,693.92 is: 98,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,309.92 : 181,209.84 = 71,693.92 : x
  2. Step 2: Convert to fraction form
    131,309.92/181,209.84 = 71,693.92/x
  3. Step 3: Cross multiply
    131,309.92x = 181,209.84 × 71,693.92
  4. Step 4: Simplify right side
    131,309.92x = 12,991,643,772.17
  5. Step 5: Solve for x
    x = 12,991,643,772.17/131,309.92
  6. Step 6: Final answer
    x = 98,938.78

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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.