Home / 280,723.29-420,959.85-80,996.19

Finding the Fourth Proportional to 280,723.29, 420,959.85 and 80,996.19

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Solution

The fourth proportional to 280,723.29, 420,959.85 and 80,996.19 is: 121,458.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,723.29 : 420,959.85 = 80,996.19 : x
  2. Step 2: Convert to fraction form
    280,723.29/420,959.85 = 80,996.19/x
  3. Step 3: Cross multiply
    280,723.29x = 420,959.85 × 80,996.19
  4. Step 4: Simplify right side
    280,723.29x = 34,096,143,992.97
  5. Step 5: Solve for x
    x = 34,096,143,992.97/280,723.29
  6. Step 6: Final answer
    x = 121,458.19

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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.