Home / 54,129.86-81,145.11-20,839.94

Finding the Fourth Proportional to 54,129.86, 81,145.11 and 20,839.94

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Solution

The fourth proportional to 54,129.86, 81,145.11 and 20,839.94 is: 31,240.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,129.86 : 81,145.11 = 20,839.94 : x
  2. Step 2: Convert to fraction form
    54,129.86/81,145.11 = 20,839.94/x
  3. Step 3: Cross multiply
    54,129.86x = 81,145.11 × 20,839.94
  4. Step 4: Simplify right side
    54,129.86x = 1,691,059,223.69
  5. Step 5: Solve for x
    x = 1,691,059,223.69/54,129.86
  6. Step 6: Final answer
    x = 31,240.78

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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.