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Finding the Fourth Proportional to 185.38, 278.12 and 69.83

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Solution

The fourth proportional to 185.38, 278.12 and 69.83 is: 104.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.38 : 278.12 = 69.83 : x
  2. Step 2: Convert to fraction form
    185.38/278.12 = 69.83/x
  3. Step 3: Cross multiply
    185.38x = 278.12 × 69.83
  4. Step 4: Simplify right side
    185.38x = 19,421.12
  5. Step 5: Solve for x
    x = 19,421.12/185.38
  6. Step 6: Final answer
    x = 104.76

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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.