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Finding the Fourth Proportional to 221,657.20, 332,534.40 and 109,391.20

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Solution

The fourth proportional to 221,657.20, 332,534.40 and 109,391.20 is: 164,110.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,657.20 : 332,534.40 = 109,391.20 : x
  2. Step 2: Convert to fraction form
    221,657.20/332,534.40 = 109,391.20/x
  3. Step 3: Cross multiply
    221,657.20x = 332,534.40 × 109,391.20
  4. Step 4: Simplify right side
    221,657.20x = 36,376,337,057.28
  5. Step 5: Solve for x
    x = 36,376,337,057.28/221,657.20
  6. Step 6: Final answer
    x = 164,110.78

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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.