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Finding the Fourth Proportional to 199.37, 299.17 and 91.17

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Solution

The fourth proportional to 199.37, 299.17 and 91.17 is: 136.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.37 : 299.17 = 91.17 : x
  2. Step 2: Convert to fraction form
    199.37/299.17 = 91.17/x
  3. Step 3: Cross multiply
    199.37x = 299.17 × 91.17
  4. Step 4: Simplify right side
    199.37x = 27,275.33
  5. Step 5: Solve for x
    x = 27,275.33/199.37
  6. Step 6: Final answer
    x = 136.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.