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Finding the Fourth Proportional to 149.74, 206.81 and 112.33

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Solution

The fourth proportional to 149.74, 206.81 and 112.33 is: 155.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.74 : 206.81 = 112.33 : x
  2. Step 2: Convert to fraction form
    149.74/206.81 = 112.33/x
  3. Step 3: Cross multiply
    149.74x = 206.81 × 112.33
  4. Step 4: Simplify right side
    149.74x = 23,230.97
  5. Step 5: Solve for x
    x = 23,230.97/149.74
  6. Step 6: Final answer
    x = 155.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.