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Finding the Fourth Proportional to 168.50, 252.76 and 65.76

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Solution

The fourth proportional to 168.50, 252.76 and 65.76 is: 98.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.50 : 252.76 = 65.76 : x
  2. Step 2: Convert to fraction form
    168.50/252.76 = 65.76/x
  3. Step 3: Cross multiply
    168.50x = 252.76 × 65.76
  4. Step 4: Simplify right side
    168.50x = 16,621.50
  5. Step 5: Solve for x
    x = 16,621.50/168.50
  6. Step 6: Final answer
    x = 98.64

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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.