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Finding the Fourth Proportional to 190.92, 286.21 and 92.03

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Solution

The fourth proportional to 190.92, 286.21 and 92.03 is: 137.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.92 : 286.21 = 92.03 : x
  2. Step 2: Convert to fraction form
    190.92/286.21 = 92.03/x
  3. Step 3: Cross multiply
    190.92x = 286.21 × 92.03
  4. Step 4: Simplify right side
    190.92x = 26,339.45
  5. Step 5: Solve for x
    x = 26,339.45/190.92
  6. Step 6: Final answer
    x = 137.96

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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.