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Finding the Fourth Proportional to 133.56, 185.18 and 129.06

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Solution

The fourth proportional to 133.56, 185.18 and 129.06 is: 178.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.56 : 185.18 = 129.06 : x
  2. Step 2: Convert to fraction form
    133.56/185.18 = 129.06/x
  3. Step 3: Cross multiply
    133.56x = 185.18 × 129.06
  4. Step 4: Simplify right side
    133.56x = 23,898.69
  5. Step 5: Solve for x
    x = 23,898.69/133.56
  6. Step 6: Final answer
    x = 178.94

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.