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Finding the Fourth Proportional to 106.44, 146.31 and 86.73

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Solution

The fourth proportional to 106.44, 146.31 and 86.73 is: 119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.44 : 146.31 = 86.73 : x
  2. Step 2: Convert to fraction form
    106.44/146.31 = 86.73/x
  3. Step 3: Cross multiply
    106.44x = 146.31 × 86.73
  4. Step 4: Simplify right side
    106.44x = 12,689.47
  5. Step 5: Solve for x
    x = 12,689.47/106.44
  6. Step 6: Final answer
    x = 119.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.