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Finding the Fourth Proportional to 221,726.90, 332,379.92 and 71,861.88

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Solution

The fourth proportional to 221,726.90, 332,379.92 and 71,861.88 is: 107,724.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,726.90 : 332,379.92 = 71,861.88 : x
  2. Step 2: Convert to fraction form
    221,726.90/332,379.92 = 71,861.88/x
  3. Step 3: Cross multiply
    221,726.90x = 332,379.92 × 71,861.88
  4. Step 4: Simplify right side
    221,726.90x = 23,885,445,925.45
  5. Step 5: Solve for x
    x = 23,885,445,925.45/221,726.90
  6. Step 6: Final answer
    x = 107,724.62

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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.