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Finding the Fourth Proportional to 178.01, 267.06 and 69.81

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Solution

The fourth proportional to 178.01, 267.06 and 69.81 is: 104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.01 : 267.06 = 69.81 : x
  2. Step 2: Convert to fraction form
    178.01/267.06 = 69.81/x
  3. Step 3: Cross multiply
    178.01x = 267.06 × 69.81
  4. Step 4: Simplify right side
    178.01x = 18,643.46
  5. Step 5: Solve for x
    x = 18,643.46/178.01
  6. Step 6: Final answer
    x = 104.74

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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.