Home / 80,580.13-120,925.72-27,989.61

Finding the Fourth Proportional to 80,580.13, 120,925.72 and 27,989.61

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Solution

The fourth proportional to 80,580.13, 120,925.72 and 27,989.61 is: 42,003.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,580.13 : 120,925.72 = 27,989.61 : x
  2. Step 2: Convert to fraction form
    80,580.13/120,925.72 = 27,989.61/x
  3. Step 3: Cross multiply
    80,580.13x = 120,925.72 × 27,989.61
  4. Step 4: Simplify right side
    80,580.13x = 3,384,664,212.90
  5. Step 5: Solve for x
    x = 3,384,664,212.90/80,580.13
  6. Step 6: Final answer
    x = 42,003.71

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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.