Home / 80,800.11-121,255.47-28,209.60

Finding the Fourth Proportional to 80,800.11, 121,255.47 and 28,209.60

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Solution

The fourth proportional to 80,800.11, 121,255.47 and 28,209.60 is: 42,333.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,800.11 : 121,255.47 = 28,209.60 : x
  2. Step 2: Convert to fraction form
    80,800.11/121,255.47 = 28,209.60/x
  3. Step 3: Cross multiply
    80,800.11x = 121,255.47 × 28,209.60
  4. Step 4: Simplify right side
    80,800.11x = 3,420,568,306.51
  5. Step 5: Solve for x
    x = 3,420,568,306.51/80,800.11
  6. Step 6: Final answer
    x = 42,333.71

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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.