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Finding the Fourth Proportional to 122.62, 168.82 and 93.46

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Solution

The fourth proportional to 122.62, 168.82 and 93.46 is: 128.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.62 : 168.82 = 93.46 : x
  2. Step 2: Convert to fraction form
    122.62/168.82 = 93.46/x
  3. Step 3: Cross multiply
    122.62x = 168.82 × 93.46
  4. Step 4: Simplify right side
    122.62x = 15,777.92
  5. Step 5: Solve for x
    x = 15,777.92/122.62
  6. Step 6: Final answer
    x = 128.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.