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Finding the Fourth Proportional to 112.54, 154.42 and 108.22

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Solution

The fourth proportional to 112.54, 154.42 and 108.22 is: 148.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.54 : 154.42 = 108.22 : x
  2. Step 2: Convert to fraction form
    112.54/154.42 = 108.22/x
  3. Step 3: Cross multiply
    112.54x = 154.42 × 108.22
  4. Step 4: Simplify right side
    112.54x = 16,711.33
  5. Step 5: Solve for x
    x = 16,711.33/112.54
  6. Step 6: Final answer
    x = 148.49

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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.