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Finding the Fourth Proportional to 173.72, 260.24 and 91.33

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Solution

The fourth proportional to 173.72, 260.24 and 91.33 is: 136.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.72 : 260.24 = 91.33 : x
  2. Step 2: Convert to fraction form
    173.72/260.24 = 91.33/x
  3. Step 3: Cross multiply
    173.72x = 260.24 × 91.33
  4. Step 4: Simplify right side
    173.72x = 23,767.70
  5. Step 5: Solve for x
    x = 23,767.70/173.72
  6. Step 6: Final answer
    x = 136.82

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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.