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Finding the Fourth Proportional to 83,956.20, 125,934.30 and 73,021.20

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Solution

The fourth proportional to 83,956.20, 125,934.30 and 73,021.20 is: 109,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,956.20 : 125,934.30 = 73,021.20 : x
  2. Step 2: Convert to fraction form
    83,956.20/125,934.30 = 73,021.20/x
  3. Step 3: Cross multiply
    83,956.20x = 125,934.30 × 73,021.20
  4. Step 4: Simplify right side
    83,956.20x = 9,195,873,707.16
  5. Step 5: Solve for x
    x = 9,195,873,707.16/83,956.20
  6. Step 6: Final answer
    x = 109,531.80

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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.