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Finding the Fourth Proportional to 112.06, 167.83 and 81.55

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Solution

The fourth proportional to 112.06, 167.83 and 81.55 is: 122.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.06 : 167.83 = 81.55 : x
  2. Step 2: Convert to fraction form
    112.06/167.83 = 81.55/x
  3. Step 3: Cross multiply
    112.06x = 167.83 × 81.55
  4. Step 4: Simplify right side
    112.06x = 13,685.29
  5. Step 5: Solve for x
    x = 13,685.29/112.06
  6. Step 6: Final answer
    x = 122.13

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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.