Home / 135,517.25-187,018.67-81,791.78

Finding the Fourth Proportional to 135,517.25, 187,018.67 and 81,791.78

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Solution

The fourth proportional to 135,517.25, 187,018.67 and 81,791.78 is: 112,875.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,517.25 : 187,018.67 = 81,791.78 : x
  2. Step 2: Convert to fraction form
    135,517.25/187,018.67 = 81,791.78/x
  3. Step 3: Cross multiply
    135,517.25x = 187,018.67 × 81,791.78
  4. Step 4: Simplify right side
    135,517.25x = 15,296,589,181.92
  5. Step 5: Solve for x
    x = 15,296,589,181.92/135,517.25
  6. Step 6: Final answer
    x = 112,875.59

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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.