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Finding the Fourth Proportional to 112.19, 168.01 and 60.70

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Solution

The fourth proportional to 112.19, 168.01 and 60.70 is: 90.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.19 : 168.01 = 60.70 : x
  2. Step 2: Convert to fraction form
    112.19/168.01 = 60.70/x
  3. Step 3: Cross multiply
    112.19x = 168.01 × 60.70
  4. Step 4: Simplify right side
    112.19x = 10,198.21
  5. Step 5: Solve for x
    x = 10,198.21/112.19
  6. Step 6: Final answer
    x = 90.90

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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.