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Finding the Fourth Proportional to 199.11, 274.98 and 137.10

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Solution

The fourth proportional to 199.11, 274.98 and 137.10 is: 189.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.11 : 274.98 = 137.10 : x
  2. Step 2: Convert to fraction form
    199.11/274.98 = 137.10/x
  3. Step 3: Cross multiply
    199.11x = 274.98 × 137.10
  4. Step 4: Simplify right side
    199.11x = 37,700.44
  5. Step 5: Solve for x
    x = 37,700.44/199.11
  6. Step 6: Final answer
    x = 189.34

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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.