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Finding the Fourth Proportional to 220,668, 331,099.20 and 72,924

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Solution

The fourth proportional to 220,668, 331,099.20 and 72,924 is: 109,418.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,668 : 331,099.20 = 72,924 : x
  2. Step 2: Convert to fraction form
    220,668/331,099.20 = 72,924/x
  3. Step 3: Cross multiply
    220,668x = 331,099.20 × 72,924
  4. Step 4: Simplify right side
    220,668x = 24,145,078,060.80
  5. Step 5: Solve for x
    x = 24,145,078,060.80/220,668
  6. Step 6: Final answer
    x = 109,418.12

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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.