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Finding the Fourth Proportional to 178.32, 267.72 and 120.36

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Solution

The fourth proportional to 178.32, 267.72 and 120.36 is: 180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.32 : 267.72 = 120.36 : x
  2. Step 2: Convert to fraction form
    178.32/267.72 = 120.36/x
  3. Step 3: Cross multiply
    178.32x = 267.72 × 120.36
  4. Step 4: Simplify right side
    178.32x = 32,222.78
  5. Step 5: Solve for x
    x = 32,222.78/178.32
  6. Step 6: Final answer
    x = 180.70

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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.