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Finding the Fourth Proportional to 178.21, 267.01 and 75.40

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Solution

The fourth proportional to 178.21, 267.01 and 75.40 is: 112.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.21 : 267.01 = 75.40 : x
  2. Step 2: Convert to fraction form
    178.21/267.01 = 75.40/x
  3. Step 3: Cross multiply
    178.21x = 267.01 × 75.40
  4. Step 4: Simplify right side
    178.21x = 20,131.70
  5. Step 5: Solve for x
    x = 20,131.70/178.21
  6. Step 6: Final answer
    x = 112.97

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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.