Home / 81,286.92-121,942.01-25,131.38

Finding the Fourth Proportional to 81,286.92, 121,942.01 and 25,131.38

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Solution

The fourth proportional to 81,286.92, 121,942.01 and 25,131.38 is: 37,700.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,286.92 : 121,942.01 = 25,131.38 : x
  2. Step 2: Convert to fraction form
    81,286.92/121,942.01 = 25,131.38/x
  3. Step 3: Cross multiply
    81,286.92x = 121,942.01 × 25,131.38
  4. Step 4: Simplify right side
    81,286.92x = 3,064,570,255.91
  5. Step 5: Solve for x
    x = 3,064,570,255.91/81,286.92
  6. Step 6: Final answer
    x = 37,700.66

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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.