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Finding the Fourth Proportional to 132.32, 182.56 and 83.20

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Solution

The fourth proportional to 132.32, 182.56 and 83.20 is: 114.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.32 : 182.56 = 83.20 : x
  2. Step 2: Convert to fraction form
    132.32/182.56 = 83.20/x
  3. Step 3: Cross multiply
    132.32x = 182.56 × 83.20
  4. Step 4: Simplify right side
    132.32x = 15,188.99
  5. Step 5: Solve for x
    x = 15,188.99/132.32
  6. Step 6: Final answer
    x = 114.79

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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.