Home / 81,249.47-121,876.91-27,940.92

Finding the Fourth Proportional to 81,249.47, 121,876.91 and 27,940.92

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Solution

The fourth proportional to 81,249.47, 121,876.91 and 27,940.92 is: 41,912.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,249.47 : 121,876.91 = 27,940.92 : x
  2. Step 2: Convert to fraction form
    81,249.47/121,876.91 = 27,940.92/x
  3. Step 3: Cross multiply
    81,249.47x = 121,876.91 × 27,940.92
  4. Step 4: Simplify right side
    81,249.47x = 3,405,353,309.49
  5. Step 5: Solve for x
    x = 3,405,353,309.49/81,249.47
  6. Step 6: Final answer
    x = 41,912.31

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1.5x scale

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.