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Finding the Fourth Proportional to 174.31, 261.46 and 66.09

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Solution

The fourth proportional to 174.31, 261.46 and 66.09 is: 99.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.31 : 261.46 = 66.09 : x
  2. Step 2: Convert to fraction form
    174.31/261.46 = 66.09/x
  3. Step 3: Cross multiply
    174.31x = 261.46 × 66.09
  4. Step 4: Simplify right side
    174.31x = 17,279.89
  5. Step 5: Solve for x
    x = 17,279.89/174.31
  6. Step 6: Final answer
    x = 99.13

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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.