Home / 80,891.36-121,278.72-28,286.72

Finding the Fourth Proportional to 80,891.36, 121,278.72 and 28,286.72

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Solution

The fourth proportional to 80,891.36, 121,278.72 and 28,286.72 is: 42,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,891.36 : 121,278.72 = 28,286.72 : x
  2. Step 2: Convert to fraction form
    80,891.36/121,278.72 = 28,286.72/x
  3. Step 3: Cross multiply
    80,891.36x = 121,278.72 × 28,286.72
  4. Step 4: Simplify right side
    80,891.36x = 3,430,577,194.60
  5. Step 5: Solve for x
    x = 3,430,577,194.60/80,891.36
  6. Step 6: Final answer
    x = 42,409.69

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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.