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Finding the Fourth Proportional to 177.85, 266.79 and 69.61

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Solution

The fourth proportional to 177.85, 266.79 and 69.61 is: 104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.85 : 266.79 = 69.61 : x
  2. Step 2: Convert to fraction form
    177.85/266.79 = 69.61/x
  3. Step 3: Cross multiply
    177.85x = 266.79 × 69.61
  4. Step 4: Simplify right side
    177.85x = 18,571.35
  5. Step 5: Solve for x
    x = 18,571.35/177.85
  6. Step 6: Final answer
    x = 104.42

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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.