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Finding the Fourth Proportional to 199.11, 274.78 and 125.40

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Solution

The fourth proportional to 199.11, 274.78 and 125.40 is: 173.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.11 : 274.78 = 125.40 : x
  2. Step 2: Convert to fraction form
    199.11/274.78 = 125.40/x
  3. Step 3: Cross multiply
    199.11x = 274.78 × 125.40
  4. Step 4: Simplify right side
    199.11x = 34,457.41
  5. Step 5: Solve for x
    x = 34,457.41/199.11
  6. Step 6: Final answer
    x = 173.06

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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.