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Finding the Fourth Proportional to 174.79, 241.21 and 108.42

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Solution

The fourth proportional to 174.79, 241.21 and 108.42 is: 149.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.79 : 241.21 = 108.42 : x
  2. Step 2: Convert to fraction form
    174.79/241.21 = 108.42/x
  3. Step 3: Cross multiply
    174.79x = 241.21 × 108.42
  4. Step 4: Simplify right side
    174.79x = 26,150.78
  5. Step 5: Solve for x
    x = 26,150.78/174.79
  6. Step 6: Final answer
    x = 149.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.