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Finding the Fourth Proportional to 125,710.65, 173,480.13 and 69,121.89

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Solution

The fourth proportional to 125,710.65, 173,480.13 and 69,121.89 is: 95,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,710.65 : 173,480.13 = 69,121.89 : x
  2. Step 2: Convert to fraction form
    125,710.65/173,480.13 = 69,121.89/x
  3. Step 3: Cross multiply
    125,710.65x = 173,480.13 × 69,121.89
  4. Step 4: Simplify right side
    125,710.65x = 11,991,274,463.05
  5. Step 5: Solve for x
    x = 11,991,274,463.05/125,710.65
  6. Step 6: Final answer
    x = 95,387.90

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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.