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Finding the Fourth Proportional to 170.25, 255.06 and 115.26

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Solution

The fourth proportional to 170.25, 255.06 and 115.26 is: 172.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.25 : 255.06 = 115.26 : x
  2. Step 2: Convert to fraction form
    170.25/255.06 = 115.26/x
  3. Step 3: Cross multiply
    170.25x = 255.06 × 115.26
  4. Step 4: Simplify right side
    170.25x = 29,398.22
  5. Step 5: Solve for x
    x = 29,398.22/170.25
  6. Step 6: Final answer
    x = 172.68

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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.