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Finding the Fourth Proportional to 170.96, 256.46 and 68.26

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Solution

The fourth proportional to 170.96, 256.46 and 68.26 is: 102.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.96 : 256.46 = 68.26 : x
  2. Step 2: Convert to fraction form
    170.96/256.46 = 68.26/x
  3. Step 3: Cross multiply
    170.96x = 256.46 × 68.26
  4. Step 4: Simplify right side
    170.96x = 17,505.96
  5. Step 5: Solve for x
    x = 17,505.96/170.96
  6. Step 6: Final answer
    x = 102.40

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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.