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Finding the Fourth Proportional to 132.45, 182.60 and 128.42

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Solution

The fourth proportional to 132.45, 182.60 and 128.42 is: 177.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.45 : 182.60 = 128.42 : x
  2. Step 2: Convert to fraction form
    132.45/182.60 = 128.42/x
  3. Step 3: Cross multiply
    132.45x = 182.60 × 128.42
  4. Step 4: Simplify right side
    132.45x = 23,449.36
  5. Step 5: Solve for x
    x = 23,449.36/132.45
  6. Step 6: Final answer
    x = 177.04

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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.