Home / 81,004.25-121,512.72-21,839.02

Finding the Fourth Proportional to 81,004.25, 121,512.72 and 21,839.02

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Solution

The fourth proportional to 81,004.25, 121,512.72 and 21,839.02 is: 32,760.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004.25 : 121,512.72 = 21,839.02 : x
  2. Step 2: Convert to fraction form
    81,004.25/121,512.72 = 21,839.02/x
  3. Step 3: Cross multiply
    81,004.25x = 121,512.72 × 21,839.02
  4. Step 4: Simplify right side
    81,004.25x = 2,653,718,722.33
  5. Step 5: Solve for x
    x = 2,653,718,722.33/81,004.25
  6. Step 6: Final answer
    x = 32,760.24

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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.