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Finding the Fourth Proportional to 168.45, 252.74 and 65.76

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Solution

The fourth proportional to 168.45, 252.74 and 65.76 is: 98.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.45 : 252.74 = 65.76 : x
  2. Step 2: Convert to fraction form
    168.45/252.74 = 65.76/x
  3. Step 3: Cross multiply
    168.45x = 252.74 × 65.76
  4. Step 4: Simplify right side
    168.45x = 16,620.35
  5. Step 5: Solve for x
    x = 16,620.35/168.45
  6. Step 6: Final answer
    x = 98.67

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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.