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Finding the Fourth Proportional to 199.55, 275.42 and 125.91

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Solution

The fourth proportional to 199.55, 275.42 and 125.91 is: 173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.55 : 275.42 = 125.91 : x
  2. Step 2: Convert to fraction form
    199.55/275.42 = 125.91/x
  3. Step 3: Cross multiply
    199.55x = 275.42 × 125.91
  4. Step 4: Simplify right side
    199.55x = 34,678.13
  5. Step 5: Solve for x
    x = 34,678.13/199.55
  6. Step 6: Final answer
    x = 173.78

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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.