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Finding the Fourth Proportional to 199.68, 275.57 and 112.33

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Solution

The fourth proportional to 199.68, 275.57 and 112.33 is: 155.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.68 : 275.57 = 112.33 : x
  2. Step 2: Convert to fraction form
    199.68/275.57 = 112.33/x
  3. Step 3: Cross multiply
    199.68x = 275.57 × 112.33
  4. Step 4: Simplify right side
    199.68x = 30,954.78
  5. Step 5: Solve for x
    x = 30,954.78/199.68
  6. Step 6: Final answer
    x = 155.02

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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.