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Finding the Fourth Proportional to 185.90, 278.68 and 108.77

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Solution

The fourth proportional to 185.90, 278.68 and 108.77 is: 163.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.90 : 278.68 = 108.77 : x
  2. Step 2: Convert to fraction form
    185.90/278.68 = 108.77/x
  3. Step 3: Cross multiply
    185.90x = 278.68 × 108.77
  4. Step 4: Simplify right side
    185.90x = 30,311.19
  5. Step 5: Solve for x
    x = 30,311.19/185.90
  6. Step 6: Final answer
    x = 163.06

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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.