Home / 81,107.25-121,660.91-21,947.55

Finding the Fourth Proportional to 81,107.25, 121,660.91 and 21,947.55

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Solution

The fourth proportional to 81,107.25, 121,660.91 and 21,947.55 is: 32,921.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,107.25 : 121,660.91 = 21,947.55 : x
  2. Step 2: Convert to fraction form
    81,107.25/121,660.91 = 21,947.55/x
  3. Step 3: Cross multiply
    81,107.25x = 121,660.91 × 21,947.55
  4. Step 4: Simplify right side
    81,107.25x = 2,670,158,795.53
  5. Step 5: Solve for x
    x = 2,670,158,795.53/81,107.25
  6. Step 6: Final answer
    x = 32,921.33

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Similar ratio
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1.5x scale

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.