Home / 80,578.13-120,922.88-27,987.66

Finding the Fourth Proportional to 80,578.13, 120,922.88 and 27,987.66

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Solution

The fourth proportional to 80,578.13, 120,922.88 and 27,987.66 is: 42,000.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,578.13 : 120,922.88 = 27,987.66 : x
  2. Step 2: Convert to fraction form
    80,578.13/120,922.88 = 27,987.66/x
  3. Step 3: Cross multiply
    80,578.13x = 120,922.88 × 27,987.66
  4. Step 4: Simplify right side
    80,578.13x = 3,384,348,311.72
  5. Step 5: Solve for x
    x = 3,384,348,311.72/80,578.13
  6. Step 6: Final answer
    x = 42,000.83

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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.