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Finding the Fourth Proportional to 125,311.82, 172,892.51 and 76,863.95

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Solution

The fourth proportional to 125,311.82, 172,892.51 and 76,863.95 is: 106,049.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,311.82 : 172,892.51 = 76,863.95 : x
  2. Step 2: Convert to fraction form
    125,311.82/172,892.51 = 76,863.95/x
  3. Step 3: Cross multiply
    125,311.82x = 172,892.51 × 76,863.95
  4. Step 4: Simplify right side
    125,311.82x = 13,289,201,868.41
  5. Step 5: Solve for x
    x = 13,289,201,868.41/125,311.82
  6. Step 6: Final answer
    x = 106,049.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.