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Finding the Fourth Proportional to 112.43, 154.17 and 101.48

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Solution

The fourth proportional to 112.43, 154.17 and 101.48 is: 139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.43 : 154.17 = 101.48 : x
  2. Step 2: Convert to fraction form
    112.43/154.17 = 101.48/x
  3. Step 3: Cross multiply
    112.43x = 154.17 × 101.48
  4. Step 4: Simplify right side
    112.43x = 15,645.17
  5. Step 5: Solve for x
    x = 15,645.17/112.43
  6. Step 6: Final answer
    x = 139.15

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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.