Home / 90,111.25-135,177.81-27,781.75

Finding the Fourth Proportional to 90,111.25, 135,177.81 and 27,781.75

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Solution

The fourth proportional to 90,111.25, 135,177.81 and 27,781.75 is: 41,676.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,111.25 : 135,177.81 = 27,781.75 : x
  2. Step 2: Convert to fraction form
    90,111.25/135,177.81 = 27,781.75/x
  3. Step 3: Cross multiply
    90,111.25x = 135,177.81 × 27,781.75
  4. Step 4: Simplify right side
    90,111.25x = 3,755,476,122.97
  5. Step 5: Solve for x
    x = 3,755,476,122.97/90,111.25
  6. Step 6: Final answer
    x = 41,676.00

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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.