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Finding the Fourth Proportional to 69,375.76, 95,757.05 and 39,178.76

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Solution

The fourth proportional to 69,375.76, 95,757.05 and 39,178.76 is: 54,077.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,375.76 : 95,757.05 = 39,178.76 : x
  2. Step 2: Convert to fraction form
    69,375.76/95,757.05 = 39,178.76/x
  3. Step 3: Cross multiply
    69,375.76x = 95,757.05 × 39,178.76
  4. Step 4: Simplify right side
    69,375.76x = 3,751,641,879.04
  5. Step 5: Solve for x
    x = 3,751,641,879.04/69,375.76
  6. Step 6: Final answer
    x = 54,077.13

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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.