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Finding the Fourth Proportional to 185.44, 278.14 and 69.88

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Solution

The fourth proportional to 185.44, 278.14 and 69.88 is: 104.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.44 : 278.14 = 69.88 : x
  2. Step 2: Convert to fraction form
    185.44/278.14 = 69.88/x
  3. Step 3: Cross multiply
    185.44x = 278.14 × 69.88
  4. Step 4: Simplify right side
    185.44x = 19,436.42
  5. Step 5: Solve for x
    x = 19,436.42/185.44
  6. Step 6: Final answer
    x = 104.81

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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.