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Finding the Fourth Proportional to 170.08, 255.32 and 115.81

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Solution

The fourth proportional to 170.08, 255.32 and 115.81 is: 173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.08 : 255.32 = 115.81 : x
  2. Step 2: Convert to fraction form
    170.08/255.32 = 115.81/x
  3. Step 3: Cross multiply
    170.08x = 255.32 × 115.81
  4. Step 4: Simplify right side
    170.08x = 29,568.61
  5. Step 5: Solve for x
    x = 29,568.61/170.08
  6. Step 6: Final answer
    x = 173.85

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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.