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Finding the Fourth Proportional to 178.08, 267.14 and 139.49

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Solution

The fourth proportional to 178.08, 267.14 and 139.49 is: 209.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.08 : 267.14 = 139.49 : x
  2. Step 2: Convert to fraction form
    178.08/267.14 = 139.49/x
  3. Step 3: Cross multiply
    178.08x = 267.14 × 139.49
  4. Step 4: Simplify right side
    178.08x = 37,261.33
  5. Step 5: Solve for x
    x = 37,261.33/178.08
  6. Step 6: Final answer
    x = 209.24

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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.