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Finding the Fourth Proportional to 132.28, 182.63 and 83.21

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Solution

The fourth proportional to 132.28, 182.63 and 83.21 is: 114.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.28 : 182.63 = 83.21 : x
  2. Step 2: Convert to fraction form
    132.28/182.63 = 83.21/x
  3. Step 3: Cross multiply
    132.28x = 182.63 × 83.21
  4. Step 4: Simplify right side
    132.28x = 15,196.64
  5. Step 5: Solve for x
    x = 15,196.64/132.28
  6. Step 6: Final answer
    x = 114.88

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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.