Home / 81,043.92-121,481.13-45,453.33

Finding the Fourth Proportional to 81,043.92, 121,481.13 and 45,453.33

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Solution

The fourth proportional to 81,043.92, 121,481.13 and 45,453.33 is: 68,132.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,043.92 : 121,481.13 = 45,453.33 : x
  2. Step 2: Convert to fraction form
    81,043.92/121,481.13 = 45,453.33/x
  3. Step 3: Cross multiply
    81,043.92x = 121,481.13 × 45,453.33
  4. Step 4: Simplify right side
    81,043.92x = 5,521,721,890.66
  5. Step 5: Solve for x
    x = 5,521,721,890.66/81,043.92
  6. Step 6: Final answer
    x = 68,132.46

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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.