Home / 126,016.20-188,805.60-81,620.10

Finding the Fourth Proportional to 126,016.20, 188,805.60 and 81,620.10

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Solution

The fourth proportional to 126,016.20, 188,805.60 and 81,620.10 is: 122,288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,016.20 : 188,805.60 = 81,620.10 : x
  2. Step 2: Convert to fraction form
    126,016.20/188,805.60 = 81,620.10/x
  3. Step 3: Cross multiply
    126,016.20x = 188,805.60 × 81,620.10
  4. Step 4: Simplify right side
    126,016.20x = 15,410,331,952.56
  5. Step 5: Solve for x
    x = 15,410,331,952.56/126,016.20
  6. Step 6: Final answer
    x = 122,288.50

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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.