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Finding the Fourth Proportional to 199.62, 275.46 and 112.31

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Solution

The fourth proportional to 199.62, 275.46 and 112.31 is: 154.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.62 : 275.46 = 112.31 : x
  2. Step 2: Convert to fraction form
    199.62/275.46 = 112.31/x
  3. Step 3: Cross multiply
    199.62x = 275.46 × 112.31
  4. Step 4: Simplify right side
    199.62x = 30,935.54
  5. Step 5: Solve for x
    x = 30,935.54/199.62
  6. Step 6: Final answer
    x = 154.97

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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.