Home / 280,553.27-420,769.76-80,836.43

Finding the Fourth Proportional to 280,553.27, 420,769.76 and 80,836.43

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Solution

The fourth proportional to 280,553.27, 420,769.76 and 80,836.43 is: 121,237.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,553.27 : 420,769.76 = 80,836.43 : x
  2. Step 2: Convert to fraction form
    280,553.27/420,769.76 = 80,836.43/x
  3. Step 3: Cross multiply
    280,553.27x = 420,769.76 × 80,836.43
  4. Step 4: Simplify right side
    280,553.27x = 34,013,522,742.33
  5. Step 5: Solve for x
    x = 34,013,522,742.33/280,553.27
  6. Step 6: Final answer
    x = 121,237.31

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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.