Home / 206,535.06-309,589.49-86,661.65

Finding the Fourth Proportional to 206,535.06, 309,589.49 and 86,661.65

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Solution

The fourth proportional to 206,535.06, 309,589.49 and 86,661.65 is: 129,903.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,535.06 : 309,589.49 = 86,661.65 : x
  2. Step 2: Convert to fraction form
    206,535.06/309,589.49 = 86,661.65/x
  3. Step 3: Cross multiply
    206,535.06x = 309,589.49 × 86,661.65
  4. Step 4: Simplify right side
    206,535.06x = 26,829,534,044.80
  5. Step 5: Solve for x
    x = 26,829,534,044.80/206,535.06
  6. Step 6: Final answer
    x = 129,903.05

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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.