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Finding the Fourth Proportional to 221,383.20, 332,031.60 and 71,587.20

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Solution

The fourth proportional to 221,383.20, 332,031.60 and 71,587.20 is: 107,366.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,383.20 : 332,031.60 = 71,587.20 : x
  2. Step 2: Convert to fraction form
    221,383.20/332,031.60 = 71,587.20/x
  3. Step 3: Cross multiply
    221,383.20x = 332,031.60 × 71,587.20
  4. Step 4: Simplify right side
    221,383.20x = 23,769,212,555.52
  5. Step 5: Solve for x
    x = 23,769,212,555.52/221,383.20
  6. Step 6: Final answer
    x = 107,366.83

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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.