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Finding the Fourth Proportional to 168.57, 253.89 and 157.77

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Solution

The fourth proportional to 168.57, 253.89 and 157.77 is: 237.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.57 : 253.89 = 157.77 : x
  2. Step 2: Convert to fraction form
    168.57/253.89 = 157.77/x
  3. Step 3: Cross multiply
    168.57x = 253.89 × 157.77
  4. Step 4: Simplify right side
    168.57x = 40,056.23
  5. Step 5: Solve for x
    x = 40,056.23/168.57
  6. Step 6: Final answer
    x = 237.62

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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.