Home / 205,286.10-307,865.15-80,665.30

Finding the Fourth Proportional to 205,286.10, 307,865.15 and 80,665.30

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Solution

The fourth proportional to 205,286.10, 307,865.15 and 80,665.30 is: 120,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,286.10 : 307,865.15 = 80,665.30 : x
  2. Step 2: Convert to fraction form
    205,286.10/307,865.15 = 80,665.30/x
  3. Step 3: Cross multiply
    205,286.10x = 307,865.15 × 80,665.30
  4. Step 4: Simplify right side
    205,286.10x = 24,834,034,684.30
  5. Step 5: Solve for x
    x = 24,834,034,684.30/205,286.10
  6. Step 6: Final answer
    x = 120,972.80

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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.