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Finding the Fourth Proportional to 72,789.90, 109,192.74 and 22,871.62

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Solution

The fourth proportional to 72,789.90, 109,192.74 and 22,871.62 is: 34,309.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,789.90 : 109,192.74 = 22,871.62 : x
  2. Step 2: Convert to fraction form
    72,789.90/109,192.74 = 22,871.62/x
  3. Step 3: Cross multiply
    72,789.90x = 109,192.74 × 22,871.62
  4. Step 4: Simplify right side
    72,789.90x = 2,497,414,856.04
  5. Step 5: Solve for x
    x = 2,497,414,856.04/72,789.90
  6. Step 6: Final answer
    x = 34,309.91

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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.