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Finding the Fourth Proportional to 220,142.20, 330,213.30 and 79,882.60

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Solution

The fourth proportional to 220,142.20, 330,213.30 and 79,882.60 is: 119,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,142.20 : 330,213.30 = 79,882.60 : x
  2. Step 2: Convert to fraction form
    220,142.20/330,213.30 = 79,882.60/x
  3. Step 3: Cross multiply
    220,142.20x = 330,213.30 × 79,882.60
  4. Step 4: Simplify right side
    220,142.20x = 26,378,296,958.58
  5. Step 5: Solve for x
    x = 26,378,296,958.58/220,142.20
  6. Step 6: Final answer
    x = 119,823.90

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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.