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Finding the Fourth Proportional to 234.59, 323.72 and 129.67

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Solution

The fourth proportional to 234.59, 323.72 and 129.67 is: 178.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.59 : 323.72 = 129.67 : x
  2. Step 2: Convert to fraction form
    234.59/323.72 = 129.67/x
  3. Step 3: Cross multiply
    234.59x = 323.72 × 129.67
  4. Step 4: Simplify right side
    234.59x = 41,976.77
  5. Step 5: Solve for x
    x = 41,976.77/234.59
  6. Step 6: Final answer
    x = 178.94

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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.