Home / 80,991.09-121,489.49-21,828.18

Finding the Fourth Proportional to 80,991.09, 121,489.49 and 21,828.18

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Solution

The fourth proportional to 80,991.09, 121,489.49 and 21,828.18 is: 32,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,991.09 : 121,489.49 = 21,828.18 : x
  2. Step 2: Convert to fraction form
    80,991.09/121,489.49 = 21,828.18/x
  3. Step 3: Cross multiply
    80,991.09x = 121,489.49 × 21,828.18
  4. Step 4: Simplify right side
    80,991.09x = 2,651,894,346.69
  5. Step 5: Solve for x
    x = 2,651,894,346.69/80,991.09
  6. Step 6: Final answer
    x = 32,743.04

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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.