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Finding the Fourth Proportional to 132.80, 183.24 and 86.17

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Solution

The fourth proportional to 132.80, 183.24 and 86.17 is: 118.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.80 : 183.24 = 86.17 : x
  2. Step 2: Convert to fraction form
    132.80/183.24 = 86.17/x
  3. Step 3: Cross multiply
    132.80x = 183.24 × 86.17
  4. Step 4: Simplify right side
    132.80x = 15,789.01
  5. Step 5: Solve for x
    x = 15,789.01/132.80
  6. Step 6: Final answer
    x = 118.89

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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.