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Finding the Fourth Proportional to 199.55, 275.38 and 112.23

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Solution

The fourth proportional to 199.55, 275.38 and 112.23 is: 154.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.55 : 275.38 = 112.23 : x
  2. Step 2: Convert to fraction form
    199.55/275.38 = 112.23/x
  3. Step 3: Cross multiply
    199.55x = 275.38 × 112.23
  4. Step 4: Simplify right side
    199.55x = 30,905.90
  5. Step 5: Solve for x
    x = 30,905.90/199.55
  6. Step 6: Final answer
    x = 154.88

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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.