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Finding the Fourth Proportional to 111.30, 168.03 and 110.70

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Solution

The fourth proportional to 111.30, 168.03 and 110.70 is: 167.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.30 : 168.03 = 110.70 : x
  2. Step 2: Convert to fraction form
    111.30/168.03 = 110.70/x
  3. Step 3: Cross multiply
    111.30x = 168.03 × 110.70
  4. Step 4: Simplify right side
    111.30x = 18,600.92
  5. Step 5: Solve for x
    x = 18,600.92/111.30
  6. Step 6: Final answer
    x = 167.12

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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.