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Finding the Fourth Proportional to 168.12, 253.62 and 159.57

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Solution

The fourth proportional to 168.12, 253.62 and 159.57 is: 240.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.12 : 253.62 = 159.57 : x
  2. Step 2: Convert to fraction form
    168.12/253.62 = 159.57/x
  3. Step 3: Cross multiply
    168.12x = 253.62 × 159.57
  4. Step 4: Simplify right side
    168.12x = 40,470.14
  5. Step 5: Solve for x
    x = 40,470.14/168.12
  6. Step 6: Final answer
    x = 240.72

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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.