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Finding the Fourth Proportional to 125,428.88, 173,091.85 and 68,843.90

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Solution

The fourth proportional to 125,428.88, 173,091.85 and 68,843.90 is: 95,004.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,428.88 : 173,091.85 = 68,843.90 : x
  2. Step 2: Convert to fraction form
    125,428.88/173,091.85 = 68,843.90/x
  3. Step 3: Cross multiply
    125,428.88x = 173,091.85 × 68,843.90
  4. Step 4: Simplify right side
    125,428.88x = 11,916,316,974.65
  5. Step 5: Solve for x
    x = 11,916,316,974.65/125,428.88
  6. Step 6: Final answer
    x = 95,004.58

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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.