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Finding the Fourth Proportional to 77.61, 115.99 and 58.24

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Solution

The fourth proportional to 77.61, 115.99 and 58.24 is: 87.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.61 : 115.99 = 58.24 : x
  2. Step 2: Convert to fraction form
    77.61/115.99 = 58.24/x
  3. Step 3: Cross multiply
    77.61x = 115.99 × 58.24
  4. Step 4: Simplify right side
    77.61x = 6,755.26
  5. Step 5: Solve for x
    x = 6,755.26/77.61
  6. Step 6: Final answer
    x = 87.04

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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.