Home / 126,021.70-188,813.85-81,625.60

Finding the Fourth Proportional to 126,021.70, 188,813.85 and 81,625.60

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Solution

The fourth proportional to 126,021.70, 188,813.85 and 81,625.60 is: 122,296.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,021.70 : 188,813.85 = 81,625.60 : x
  2. Step 2: Convert to fraction form
    126,021.70/188,813.85 = 81,625.60/x
  3. Step 3: Cross multiply
    126,021.70x = 188,813.85 × 81,625.60
  4. Step 4: Simplify right side
    126,021.70x = 15,412,043,794.56
  5. Step 5: Solve for x
    x = 15,412,043,794.56/126,021.70
  6. Step 6: Final answer
    x = 122,296.75

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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.