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Finding the Fourth Proportional to 177.42, 266.15 and 69.19

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Solution

The fourth proportional to 177.42, 266.15 and 69.19 is: 103.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.42 : 266.15 = 69.19 : x
  2. Step 2: Convert to fraction form
    177.42/266.15 = 69.19/x
  3. Step 3: Cross multiply
    177.42x = 266.15 × 69.19
  4. Step 4: Simplify right side
    177.42x = 18,414.43
  5. Step 5: Solve for x
    x = 18,414.43/177.42
  6. Step 6: Final answer
    x = 103.79

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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.