Home / 81,215.73-121,741.78-33,857.02

Finding the Fourth Proportional to 81,215.73, 121,741.78 and 33,857.02

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Solution

The fourth proportional to 81,215.73, 121,741.78 and 33,857.02 is: 50,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.73 : 121,741.78 = 33,857.02 : x
  2. Step 2: Convert to fraction form
    81,215.73/121,741.78 = 33,857.02/x
  3. Step 3: Cross multiply
    81,215.73x = 121,741.78 × 33,857.02
  4. Step 4: Simplify right side
    81,215.73x = 4,121,813,880.30
  5. Step 5: Solve for x
    x = 4,121,813,880.30/81,215.73
  6. Step 6: Final answer
    x = 50,751.42

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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.