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Finding the Fourth Proportional to 199.05, 274.65 and 111.71

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Solution

The fourth proportional to 199.05, 274.65 and 111.71 is: 154.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.05 : 274.65 = 111.71 : x
  2. Step 2: Convert to fraction form
    199.05/274.65 = 111.71/x
  3. Step 3: Cross multiply
    199.05x = 274.65 × 111.71
  4. Step 4: Simplify right side
    199.05x = 30,681.15
  5. Step 5: Solve for x
    x = 30,681.15/199.05
  6. Step 6: Final answer
    x = 154.14

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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.