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Finding the Fourth Proportional to 132.70, 182.99 and 129.72

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Solution

The fourth proportional to 132.70, 182.99 and 129.72 is: 178.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.70 : 182.99 = 129.72 : x
  2. Step 2: Convert to fraction form
    132.70/182.99 = 129.72/x
  3. Step 3: Cross multiply
    132.70x = 182.99 × 129.72
  4. Step 4: Simplify right side
    132.70x = 23,737.46
  5. Step 5: Solve for x
    x = 23,737.46/132.70
  6. Step 6: Final answer
    x = 178.88

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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.