Home / 81,019.22-121,540.97-28,419.44

Finding the Fourth Proportional to 81,019.22, 121,540.97 and 28,419.44

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Solution

The fourth proportional to 81,019.22, 121,540.97 and 28,419.44 is: 42,633.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,019.22 : 121,540.97 = 28,419.44 : x
  2. Step 2: Convert to fraction form
    81,019.22/121,540.97 = 28,419.44/x
  3. Step 3: Cross multiply
    81,019.22x = 121,540.97 × 28,419.44
  4. Step 4: Simplify right side
    81,019.22x = 3,454,125,767.80
  5. Step 5: Solve for x
    x = 3,454,125,767.80/81,019.22
  6. Step 6: Final answer
    x = 42,633.41

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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.