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Finding the Fourth Proportional to 170.02, 255.10 and 67.28

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Solution

The fourth proportional to 170.02, 255.10 and 67.28 is: 100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.02 : 255.10 = 67.28 : x
  2. Step 2: Convert to fraction form
    170.02/255.10 = 67.28/x
  3. Step 3: Cross multiply
    170.02x = 255.10 × 67.28
  4. Step 4: Simplify right side
    170.02x = 17,163.25
  5. Step 5: Solve for x
    x = 17,163.25/170.02
  6. Step 6: Final answer
    x = 100.95

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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.