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Finding the Fourth Proportional to 199.76, 275.69 and 112.44

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Solution

The fourth proportional to 199.76, 275.69 and 112.44 is: 155.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.76 : 275.69 = 112.44 : x
  2. Step 2: Convert to fraction form
    199.76/275.69 = 112.44/x
  3. Step 3: Cross multiply
    199.76x = 275.69 × 112.44
  4. Step 4: Simplify right side
    199.76x = 30,998.02
  5. Step 5: Solve for x
    x = 30,998.02/199.76
  6. Step 6: Final answer
    x = 155.18

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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.