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Finding the Fourth Proportional to 170.67, 255.85 and 67.99

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Solution

The fourth proportional to 170.67, 255.85 and 67.99 is: 101.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.67 : 255.85 = 67.99 : x
  2. Step 2: Convert to fraction form
    170.67/255.85 = 67.99/x
  3. Step 3: Cross multiply
    170.67x = 255.85 × 67.99
  4. Step 4: Simplify right side
    170.67x = 17,395.24
  5. Step 5: Solve for x
    x = 17,395.24/170.67
  6. Step 6: Final answer
    x = 101.92

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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.