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Finding the Fourth Proportional to 219,793.20, 329,689.80 and 72,049.20

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Solution

The fourth proportional to 219,793.20, 329,689.80 and 72,049.20 is: 108,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,793.20 : 329,689.80 = 72,049.20 : x
  2. Step 2: Convert to fraction form
    219,793.20/329,689.80 = 72,049.20/x
  3. Step 3: Cross multiply
    219,793.20x = 329,689.80 × 72,049.20
  4. Step 4: Simplify right side
    219,793.20x = 23,753,886,338.16
  5. Step 5: Solve for x
    x = 23,753,886,338.16/219,793.20
  6. Step 6: Final answer
    x = 108,073.80

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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.