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Finding the Fourth Proportional to 84,116.79, 125,923.10 and 81,125.97

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Solution

The fourth proportional to 84,116.79, 125,923.10 and 81,125.97 is: 121,445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,116.79 : 125,923.10 = 81,125.97 : x
  2. Step 2: Convert to fraction form
    84,116.79/125,923.10 = 81,125.97/x
  3. Step 3: Cross multiply
    84,116.79x = 125,923.10 × 81,125.97
  4. Step 4: Simplify right side
    84,116.79x = 10,215,633,227.28
  5. Step 5: Solve for x
    x = 10,215,633,227.28/84,116.79
  6. Step 6: Final answer
    x = 121,445.83

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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.