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Finding the Fourth Proportional to 178.96, 266.26 and 168.72

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Solution

The fourth proportional to 178.96, 266.26 and 168.72 is: 251.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.96 : 266.26 = 168.72 : x
  2. Step 2: Convert to fraction form
    178.96/266.26 = 168.72/x
  3. Step 3: Cross multiply
    178.96x = 266.26 × 168.72
  4. Step 4: Simplify right side
    178.96x = 44,923.39
  5. Step 5: Solve for x
    x = 44,923.39/178.96
  6. Step 6: Final answer
    x = 251.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.