Home / 319,781.20-479,542.20-109,310.80

Finding the Fourth Proportional to 319,781.20, 479,542.20 and 109,310.80

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Solution

The fourth proportional to 319,781.20, 479,542.20 and 109,310.80 is: 163,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,781.20 : 479,542.20 = 109,310.80 : x
  2. Step 2: Convert to fraction form
    319,781.20/479,542.20 = 109,310.80/x
  3. Step 3: Cross multiply
    319,781.20x = 479,542.20 × 109,310.80
  4. Step 4: Simplify right side
    319,781.20x = 52,419,141,515.76
  5. Step 5: Solve for x
    x = 52,419,141,515.76/319,781.20
  6. Step 6: Final answer
    x = 163,921.90

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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.