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Finding the Fourth Proportional to 199.98, 275.80 and 129.97

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Solution

The fourth proportional to 199.98, 275.80 and 129.97 is: 179.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.98 : 275.80 = 129.97 : x
  2. Step 2: Convert to fraction form
    199.98/275.80 = 129.97/x
  3. Step 3: Cross multiply
    199.98x = 275.80 × 129.97
  4. Step 4: Simplify right side
    199.98x = 35,846.05
  5. Step 5: Solve for x
    x = 35,846.05/199.98
  6. Step 6: Final answer
    x = 179.25

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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.