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Finding the Fourth Proportional to 219,909.60, 329,821.20 and 72,165.60

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Solution

The fourth proportional to 219,909.60, 329,821.20 and 72,165.60 is: 108,234.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,909.60 : 329,821.20 = 72,165.60 : x
  2. Step 2: Convert to fraction form
    219,909.60/329,821.20 = 72,165.60/x
  3. Step 3: Cross multiply
    219,909.60x = 329,821.20 × 72,165.60
  4. Step 4: Simplify right side
    219,909.60x = 23,801,744,790.72
  5. Step 5: Solve for x
    x = 23,801,744,790.72/219,909.60
  6. Step 6: Final answer
    x = 108,234.22

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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.