Home / 80,809.11-121,268.97-28,218.60

Finding the Fourth Proportional to 80,809.11, 121,268.97 and 28,218.60

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Solution

The fourth proportional to 80,809.11, 121,268.97 and 28,218.60 is: 42,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,809.11 : 121,268.97 = 28,218.60 : x
  2. Step 2: Convert to fraction form
    80,809.11/121,268.97 = 28,218.60/x
  3. Step 3: Cross multiply
    80,809.11x = 121,268.97 × 28,218.60
  4. Step 4: Simplify right side
    80,809.11x = 3,422,040,556.84
  5. Step 5: Solve for x
    x = 3,422,040,556.84/80,809.11
  6. Step 6: Final answer
    x = 42,347.21

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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.