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Finding the Fourth Proportional to 125,873.46, 188,785.08 and 80,761.32

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Solution

The fourth proportional to 125,873.46, 188,785.08 and 80,761.32 is: 121,125.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,873.46 : 188,785.08 = 80,761.32 : x
  2. Step 2: Convert to fraction form
    125,873.46/188,785.08 = 80,761.32/x
  3. Step 3: Cross multiply
    125,873.46x = 188,785.08 × 80,761.32
  4. Step 4: Simplify right side
    125,873.46x = 15,246,532,257.11
  5. Step 5: Solve for x
    x = 15,246,532,257.11/125,873.46
  6. Step 6: Final answer
    x = 121,125.87

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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.