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Finding the Fourth Proportional to 112.46, 168.41 and 66.59

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Solution

The fourth proportional to 112.46, 168.41 and 66.59 is: 99.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.46 : 168.41 = 66.59 : x
  2. Step 2: Convert to fraction form
    112.46/168.41 = 66.59/x
  3. Step 3: Cross multiply
    112.46x = 168.41 × 66.59
  4. Step 4: Simplify right side
    112.46x = 11,214.38
  5. Step 5: Solve for x
    x = 11,214.38/112.46
  6. Step 6: Final answer
    x = 99.72

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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.