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Finding the Fourth Proportional to 76.95, 115.02 and 58.73

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Solution

The fourth proportional to 76.95, 115.02 and 58.73 is: 87.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.95 : 115.02 = 58.73 : x
  2. Step 2: Convert to fraction form
    76.95/115.02 = 58.73/x
  3. Step 3: Cross multiply
    76.95x = 115.02 × 58.73
  4. Step 4: Simplify right side
    76.95x = 6,754.55
  5. Step 5: Solve for x
    x = 6,754.55/76.95
  6. Step 6: Final answer
    x = 87.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.