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Finding the Fourth Proportional to 190.89, 286.25 and 82.53

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Solution

The fourth proportional to 190.89, 286.25 and 82.53 is: 123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.89 : 286.25 = 82.53 : x
  2. Step 2: Convert to fraction form
    190.89/286.25 = 82.53/x
  3. Step 3: Cross multiply
    190.89x = 286.25 × 82.53
  4. Step 4: Simplify right side
    190.89x = 23,623.80
  5. Step 5: Solve for x
    x = 23,623.80/190.89
  6. Step 6: Final answer
    x = 123.76

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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.