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Finding the Fourth Proportional to 168.56, 254.18 and 155.12

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Solution

The fourth proportional to 168.56, 254.18 and 155.12 is: 233.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.56 : 254.18 = 155.12 : x
  2. Step 2: Convert to fraction form
    168.56/254.18 = 155.12/x
  3. Step 3: Cross multiply
    168.56x = 254.18 × 155.12
  4. Step 4: Simplify right side
    168.56x = 39,428.40
  5. Step 5: Solve for x
    x = 39,428.40/168.56
  6. Step 6: Final answer
    x = 233.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.