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Finding the Fourth Proportional to 81,173.97, 121,763.04 and 38,469.38

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Solution

The fourth proportional to 81,173.97, 121,763.04 and 38,469.38 is: 57,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,173.97 : 121,763.04 = 38,469.38 : x
  2. Step 2: Convert to fraction form
    81,173.97/121,763.04 = 38,469.38/x
  3. Step 3: Cross multiply
    81,173.97x = 121,763.04 × 38,469.38
  4. Step 4: Simplify right side
    81,173.97x = 4,684,148,046.90
  5. Step 5: Solve for x
    x = 4,684,148,046.90/81,173.97
  6. Step 6: Final answer
    x = 57,705.05

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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.