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Finding the Fourth Proportional to 73,118.43, 109,721.34 and 67,169.79

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Solution

The fourth proportional to 73,118.43, 109,721.34 and 67,169.79 is: 100,794.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,118.43 : 109,721.34 = 67,169.79 : x
  2. Step 2: Convert to fraction form
    73,118.43/109,721.34 = 67,169.79/x
  3. Step 3: Cross multiply
    73,118.43x = 109,721.34 × 67,169.79
  4. Step 4: Simplify right side
    73,118.43x = 7,369,959,366.32
  5. Step 5: Solve for x
    x = 7,369,959,366.32/73,118.43
  6. Step 6: Final answer
    x = 100,794.83

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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.