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Finding the Fourth Proportional to 178.27, 266.90 and 120.35

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Solution

The fourth proportional to 178.27, 266.90 and 120.35 is: 180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.27 : 266.90 = 120.35 : x
  2. Step 2: Convert to fraction form
    178.27/266.90 = 120.35/x
  3. Step 3: Cross multiply
    178.27x = 266.90 × 120.35
  4. Step 4: Simplify right side
    178.27x = 32,121.48
  5. Step 5: Solve for x
    x = 32,121.48/178.27
  6. Step 6: Final answer
    x = 180.19

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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.