Home / 90,115.56-135,175.20-27,786

Finding the Fourth Proportional to 90,115.56, 135,175.20 and 27,786

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Solution

The fourth proportional to 90,115.56, 135,175.20 and 27,786 is: 41,679.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,115.56 : 135,175.20 = 27,786 : x
  2. Step 2: Convert to fraction form
    90,115.56/135,175.20 = 27,786/x
  3. Step 3: Cross multiply
    90,115.56x = 135,175.20 × 27,786
  4. Step 4: Simplify right side
    90,115.56x = 3,755,978,107.20
  5. Step 5: Solve for x
    x = 3,755,978,107.20/90,115.56
  6. Step 6: Final answer
    x = 41,679.57

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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.