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Finding the Fourth Proportional to 86.28, 118.92 and 59.97

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Solution

The fourth proportional to 86.28, 118.92 and 59.97 is: 82.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.28 : 118.92 = 59.97 : x
  2. Step 2: Convert to fraction form
    86.28/118.92 = 59.97/x
  3. Step 3: Cross multiply
    86.28x = 118.92 × 59.97
  4. Step 4: Simplify right side
    86.28x = 7,131.72
  5. Step 5: Solve for x
    x = 7,131.72/86.28
  6. Step 6: Final answer
    x = 82.65

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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.