Home / 81,321.58-121,970.04-22,161.97

Finding the Fourth Proportional to 81,321.58, 121,970.04 and 22,161.97

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Solution

The fourth proportional to 81,321.58, 121,970.04 and 22,161.97 is: 33,239.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,321.58 : 121,970.04 = 22,161.97 : x
  2. Step 2: Convert to fraction form
    81,321.58/121,970.04 = 22,161.97/x
  3. Step 3: Cross multiply
    81,321.58x = 121,970.04 × 22,161.97
  4. Step 4: Simplify right side
    81,321.58x = 2,703,096,367.38
  5. Step 5: Solve for x
    x = 2,703,096,367.38/81,321.58
  6. Step 6: Final answer
    x = 33,239.59

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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.