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Finding the Fourth Proportional to 170.34, 255.53 and 67.61

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Solution

The fourth proportional to 170.34, 255.53 and 67.61 is: 101.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.34 : 255.53 = 67.61 : x
  2. Step 2: Convert to fraction form
    170.34/255.53 = 67.61/x
  3. Step 3: Cross multiply
    170.34x = 255.53 × 67.61
  4. Step 4: Simplify right side
    170.34x = 17,277.19
  5. Step 5: Solve for x
    x = 17,277.19/170.34
  6. Step 6: Final answer
    x = 101.43

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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.