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Finding the Fourth Proportional to 68,757.31, 103,145.85 and 26,078.44

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Solution

The fourth proportional to 68,757.31, 103,145.85 and 26,078.44 is: 39,121.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,757.31 : 103,145.85 = 26,078.44 : x
  2. Step 2: Convert to fraction form
    68,757.31/103,145.85 = 26,078.44/x
  3. Step 3: Cross multiply
    68,757.31x = 103,145.85 × 26,078.44
  4. Step 4: Simplify right side
    68,757.31x = 2,689,882,860.47
  5. Step 5: Solve for x
    x = 2,689,882,860.47/68,757.31
  6. Step 6: Final answer
    x = 39,121.41

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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.