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Finding the Fourth Proportional to 174, 240.21 and 122.34

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Solution

The fourth proportional to 174, 240.21 and 122.34 is: 168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    174 : 240.21 = 122.34 : x
  2. Step 2: Convert to fraction form
    174/240.21 = 122.34/x
  3. Step 3: Cross multiply
    174x = 240.21 × 122.34
  4. Step 4: Simplify right side
    174x = 29,387.29
  5. Step 5: Solve for x
    x = 29,387.29/174
  6. Step 6: Final answer
    x = 168.89

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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.