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Finding the Fourth Proportional to 173.96, 261.04 and 81.39

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Solution

The fourth proportional to 173.96, 261.04 and 81.39 is: 122.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.96 : 261.04 = 81.39 : x
  2. Step 2: Convert to fraction form
    173.96/261.04 = 81.39/x
  3. Step 3: Cross multiply
    173.96x = 261.04 × 81.39
  4. Step 4: Simplify right side
    173.96x = 21,246.05
  5. Step 5: Solve for x
    x = 21,246.05/173.96
  6. Step 6: Final answer
    x = 122.14

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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.