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Finding the Fourth Proportional to 125,668, 173,422.11 and 69,079.78

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Solution

The fourth proportional to 125,668, 173,422.11 and 69,079.78 is: 95,330.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,668 : 173,422.11 = 69,079.78 : x
  2. Step 2: Convert to fraction form
    125,668/173,422.11 = 69,079.78/x
  3. Step 3: Cross multiply
    125,668x = 173,422.11 × 69,079.78
  4. Step 4: Simplify right side
    125,668x = 11,979,961,205.94
  5. Step 5: Solve for x
    x = 11,979,961,205.94/125,668
  6. Step 6: Final answer
    x = 95,330.24

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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.