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Finding the Fourth Proportional to 221,796.10, 332,694.15 and 81,609.40

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Solution

The fourth proportional to 221,796.10, 332,694.15 and 81,609.40 is: 122,414.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,796.10 : 332,694.15 = 81,609.40 : x
  2. Step 2: Convert to fraction form
    221,796.10/332,694.15 = 81,609.40/x
  3. Step 3: Cross multiply
    221,796.10x = 332,694.15 × 81,609.40
  4. Step 4: Simplify right side
    221,796.10x = 27,150,969,965.01
  5. Step 5: Solve for x
    x = 27,150,969,965.01/221,796.10
  6. Step 6: Final answer
    x = 122,414.10

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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.