Home / 80,991.08-121,489.48-21,828.18

Finding the Fourth Proportional to 80,991.08, 121,489.48 and 21,828.18

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Solution

The fourth proportional to 80,991.08, 121,489.48 and 21,828.18 is: 32,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,991.08 : 121,489.48 = 21,828.18 : x
  2. Step 2: Convert to fraction form
    80,991.08/121,489.48 = 21,828.18/x
  3. Step 3: Cross multiply
    80,991.08x = 121,489.48 × 21,828.18
  4. Step 4: Simplify right side
    80,991.08x = 2,651,894,237.55
  5. Step 5: Solve for x
    x = 2,651,894,237.55/80,991.08
  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.