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Finding the Fourth Proportional to 220,680.60, 331,020.90 and 72,936.60

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Solution

The fourth proportional to 220,680.60, 331,020.90 and 72,936.60 is: 109,404.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,680.60 : 331,020.90 = 72,936.60 : x
  2. Step 2: Convert to fraction form
    220,680.60/331,020.90 = 72,936.60/x
  3. Step 3: Cross multiply
    220,680.60x = 331,020.90 × 72,936.60
  4. Step 4: Simplify right side
    220,680.60x = 24,143,538,974.94
  5. Step 5: Solve for x
    x = 24,143,538,974.94/220,680.60
  6. Step 6: Final answer
    x = 109,404.90

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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.