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Finding the Fourth Proportional to 137.84, 190.17 and 99.09

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Solution

The fourth proportional to 137.84, 190.17 and 99.09 is: 136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.84 : 190.17 = 99.09 : x
  2. Step 2: Convert to fraction form
    137.84/190.17 = 99.09/x
  3. Step 3: Cross multiply
    137.84x = 190.17 × 99.09
  4. Step 4: Simplify right side
    137.84x = 18,843.95
  5. Step 5: Solve for x
    x = 18,843.95/137.84
  6. Step 6: Final answer
    x = 136.71

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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.