Home / 81,190.11-121,799.14-27,879.56

Finding the Fourth Proportional to 81,190.11, 121,799.14 and 27,879.56

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Solution

The fourth proportional to 81,190.11, 121,799.14 and 27,879.56 is: 41,824.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,190.11 : 121,799.14 = 27,879.56 : x
  2. Step 2: Convert to fraction form
    81,190.11/121,799.14 = 27,879.56/x
  3. Step 3: Cross multiply
    81,190.11x = 121,799.14 × 27,879.56
  4. Step 4: Simplify right side
    81,190.11x = 3,395,706,431.58
  5. Step 5: Solve for x
    x = 3,395,706,431.58/81,190.11
  6. Step 6: Final answer
    x = 41,824.14

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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.