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Finding the Fourth Proportional to 68,942.56, 95,140.68 and 39,134.56

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Solution

The fourth proportional to 68,942.56, 95,140.68 and 39,134.56 is: 54,005.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,942.56 : 95,140.68 = 39,134.56 : x
  2. Step 2: Convert to fraction form
    68,942.56/95,140.68 = 39,134.56/x
  3. Step 3: Cross multiply
    68,942.56x = 95,140.68 × 39,134.56
  4. Step 4: Simplify right side
    68,942.56x = 3,723,288,649.90
  5. Step 5: Solve for x
    x = 3,723,288,649.90/68,942.56
  6. Step 6: Final answer
    x = 54,005.66

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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.