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Finding the Fourth Proportional to 170.35, 255.46 and 67.61

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Solution

The fourth proportional to 170.35, 255.46 and 67.61 is: 101.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.35 : 255.46 = 67.61 : x
  2. Step 2: Convert to fraction form
    170.35/255.46 = 67.61/x
  3. Step 3: Cross multiply
    170.35x = 255.46 × 67.61
  4. Step 4: Simplify right side
    170.35x = 17,271.65
  5. Step 5: Solve for x
    x = 17,271.65/170.35
  6. Step 6: Final answer
    x = 101.39

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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.