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Finding the Fourth Proportional to 133.56, 182.61 and 128.52

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Solution

The fourth proportional to 133.56, 182.61 and 128.52 is: 175.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.56 : 182.61 = 128.52 : x
  2. Step 2: Convert to fraction form
    133.56/182.61 = 128.52/x
  3. Step 3: Cross multiply
    133.56x = 182.61 × 128.52
  4. Step 4: Simplify right side
    133.56x = 23,469.04
  5. Step 5: Solve for x
    x = 23,469.04/133.56
  6. Step 6: Final answer
    x = 175.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.