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Finding the Fourth Proportional to 190.28, 262.38 and 123.92

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Solution

The fourth proportional to 190.28, 262.38 and 123.92 is: 170.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.28 : 262.38 = 123.92 : x
  2. Step 2: Convert to fraction form
    190.28/262.38 = 123.92/x
  3. Step 3: Cross multiply
    190.28x = 262.38 × 123.92
  4. Step 4: Simplify right side
    190.28x = 32,514.13
  5. Step 5: Solve for x
    x = 32,514.13/190.28
  6. Step 6: Final answer
    x = 170.88

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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.