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Finding the Fourth Proportional to 185.32, 278.08 and 75.68

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Solution

The fourth proportional to 185.32, 278.08 and 75.68 is: 113.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.32 : 278.08 = 75.68 : x
  2. Step 2: Convert to fraction form
    185.32/278.08 = 75.68/x
  3. Step 3: Cross multiply
    185.32x = 278.08 × 75.68
  4. Step 4: Simplify right side
    185.32x = 21,046.55
  5. Step 5: Solve for x
    x = 21,046.55/185.32
  6. Step 6: Final answer
    x = 113.57

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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.