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Finding the Fourth Proportional to 173.89, 240.15 and 129.57

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Solution

The fourth proportional to 173.89, 240.15 and 129.57 is: 178.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.89 : 240.15 = 129.57 : x
  2. Step 2: Convert to fraction form
    173.89/240.15 = 129.57/x
  3. Step 3: Cross multiply
    173.89x = 240.15 × 129.57
  4. Step 4: Simplify right side
    173.89x = 31,116.24
  5. Step 5: Solve for x
    x = 31,116.24/173.89
  6. Step 6: Final answer
    x = 178.94

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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.