Home / 81,327.15-121,994.15-28,736.91

Finding the Fourth Proportional to 81,327.15, 121,994.15 and 28,736.91

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Solution

The fourth proportional to 81,327.15, 121,994.15 and 28,736.91 is: 43,106.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,327.15 : 121,994.15 = 28,736.91 : x
  2. Step 2: Convert to fraction form
    81,327.15/121,994.15 = 28,736.91/x
  3. Step 3: Cross multiply
    81,327.15x = 121,994.15 × 28,736.91
  4. Step 4: Simplify right side
    81,327.15x = 3,505,734,765.39
  5. Step 5: Solve for x
    x = 3,505,734,765.39/81,327.15
  6. Step 6: Final answer
    x = 43,106.57

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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.