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Finding the Fourth Proportional to 219,908.60, 329,819.70 and 72,164.60

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Solution

The fourth proportional to 219,908.60, 329,819.70 and 72,164.60 is: 108,232.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,908.60 : 329,819.70 = 72,164.60 : x
  2. Step 2: Convert to fraction form
    219,908.60/329,819.70 = 72,164.60/x
  3. Step 3: Cross multiply
    219,908.60x = 329,819.70 × 72,164.60
  4. Step 4: Simplify right side
    219,908.60x = 23,801,306,722.62
  5. Step 5: Solve for x
    x = 23,801,306,722.62/219,908.60
  6. Step 6: Final answer
    x = 108,232.72

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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.