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Finding the Fourth Proportional to 178.56, 268.24 and 129.96

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Solution

The fourth proportional to 178.56, 268.24 and 129.96 is: 195.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.56 : 268.24 = 129.96 : x
  2. Step 2: Convert to fraction form
    178.56/268.24 = 129.96/x
  3. Step 3: Cross multiply
    178.56x = 268.24 × 129.96
  4. Step 4: Simplify right side
    178.56x = 34,860.47
  5. Step 5: Solve for x
    x = 34,860.47/178.56
  6. Step 6: Final answer
    x = 195.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.