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Finding the Fourth Proportional to 168.15, 250.75 and 156.61

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Solution

The fourth proportional to 168.15, 250.75 and 156.61 is: 233.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.15 : 250.75 = 156.61 : x
  2. Step 2: Convert to fraction form
    168.15/250.75 = 156.61/x
  3. Step 3: Cross multiply
    168.15x = 250.75 × 156.61
  4. Step 4: Simplify right side
    168.15x = 39,269.96
  5. Step 5: Solve for x
    x = 39,269.96/168.15
  6. Step 6: Final answer
    x = 233.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.