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Finding the Fourth Proportional to 190.38, 262.72 and 103.05

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Solution

The fourth proportional to 190.38, 262.72 and 103.05 is: 142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.38 : 262.72 = 103.05 : x
  2. Step 2: Convert to fraction form
    190.38/262.72 = 103.05/x
  3. Step 3: Cross multiply
    190.38x = 262.72 × 103.05
  4. Step 4: Simplify right side
    190.38x = 27,073.23
  5. Step 5: Solve for x
    x = 27,073.23/190.38
  6. Step 6: Final answer
    x = 142.21

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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.