Home / 206,198.30-309,221.58-71,228.02

Finding the Fourth Proportional to 206,198.30, 309,221.58 and 71,228.02

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Solution

The fourth proportional to 206,198.30, 309,221.58 and 71,228.02 is: 106,815.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,198.30 : 309,221.58 = 71,228.02 : x
  2. Step 2: Convert to fraction form
    206,198.30/309,221.58 = 71,228.02/x
  3. Step 3: Cross multiply
    206,198.30x = 309,221.58 × 71,228.02
  4. Step 4: Simplify right side
    206,198.30x = 22,025,240,111.62
  5. Step 5: Solve for x
    x = 22,025,240,111.62/206,198.30
  6. Step 6: Final answer
    x = 106,815.82

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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.