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Finding the Fourth Proportional to 199.82, 275.73 and 122.18

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Solution

The fourth proportional to 199.82, 275.73 and 122.18 is: 168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.82 : 275.73 = 122.18 : x
  2. Step 2: Convert to fraction form
    199.82/275.73 = 122.18/x
  3. Step 3: Cross multiply
    199.82x = 275.73 × 122.18
  4. Step 4: Simplify right side
    199.82x = 33,688.69
  5. Step 5: Solve for x
    x = 33,688.69/199.82
  6. Step 6: Final answer
    x = 168.60

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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.