Home / 81,109.02-121,659.85-27,805.73

Finding the Fourth Proportional to 81,109.02, 121,659.85 and 27,805.73

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Solution

The fourth proportional to 81,109.02, 121,659.85 and 27,805.73 is: 41,707.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,109.02 : 121,659.85 = 27,805.73 : x
  2. Step 2: Convert to fraction form
    81,109.02/121,659.85 = 27,805.73/x
  3. Step 3: Cross multiply
    81,109.02x = 121,659.85 × 27,805.73
  4. Step 4: Simplify right side
    81,109.02x = 3,382,840,940.94
  5. Step 5: Solve for x
    x = 3,382,840,940.94/81,109.02
  6. Step 6: Final answer
    x = 41,707.33

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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.