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Finding the Fourth Proportional to 76.69, 115.00 and 27.92

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Solution

The fourth proportional to 76.69, 115.00 and 27.92 is: 41.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.69 : 115.00 = 27.92 : x
  2. Step 2: Convert to fraction form
    76.69/115.00 = 27.92/x
  3. Step 3: Cross multiply
    76.69x = 115.00 × 27.92
  4. Step 4: Simplify right side
    76.69x = 3,211.02
  5. Step 5: Solve for x
    x = 3,211.02/76.69
  6. Step 6: Final answer
    x = 41.87

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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.