Home / 80,761.80-121,151.21-28,171.74

Finding the Fourth Proportional to 80,761.80, 121,151.21 and 28,171.74

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Solution

The fourth proportional to 80,761.80, 121,151.21 and 28,171.74 is: 42,260.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,761.80 : 121,151.21 = 28,171.74 : x
  2. Step 2: Convert to fraction form
    80,761.80/121,151.21 = 28,171.74/x
  3. Step 3: Cross multiply
    80,761.80x = 121,151.21 × 28,171.74
  4. Step 4: Simplify right side
    80,761.80x = 3,413,040,247.95
  5. Step 5: Solve for x
    x = 3,413,040,247.95/80,761.80
  6. Step 6: Final answer
    x = 42,260.58

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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.