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Finding the Fourth Proportional to 221,489.20, 332,282.40 and 71,736.40

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Solution

The fourth proportional to 221,489.20, 332,282.40 and 71,736.40 is: 107,620.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,489.20 : 332,282.40 = 71,736.40 : x
  2. Step 2: Convert to fraction form
    221,489.20/332,282.40 = 71,736.40/x
  3. Step 3: Cross multiply
    221,489.20x = 332,282.40 × 71,736.40
  4. Step 4: Simplify right side
    221,489.20x = 23,836,743,159.36
  5. Step 5: Solve for x
    x = 23,836,743,159.36/221,489.20
  6. Step 6: Final answer
    x = 107,620.34

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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.