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Finding the Fourth Proportional to 221,489.70, 332,234.55 and 81,230.10

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Solution

The fourth proportional to 221,489.70, 332,234.55 and 81,230.10 is: 121,845.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,489.70 : 332,234.55 = 81,230.10 : x
  2. Step 2: Convert to fraction form
    221,489.70/332,234.55 = 81,230.10/x
  3. Step 3: Cross multiply
    221,489.70x = 332,234.55 × 81,230.10
  4. Step 4: Simplify right side
    221,489.70x = 26,987,445,719.96
  5. Step 5: Solve for x
    x = 26,987,445,719.96/221,489.70
  6. Step 6: Final answer
    x = 121,845.15

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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.