Home / 206,898.09-309,089.39-131,413.78

Finding the Fourth Proportional to 206,898.09, 309,089.39 and 131,413.78

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Solution

The fourth proportional to 206,898.09, 309,089.39 and 131,413.78 is: 196,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,898.09 : 309,089.39 = 131,413.78 : x
  2. Step 2: Convert to fraction form
    206,898.09/309,089.39 = 131,413.78/x
  3. Step 3: Cross multiply
    206,898.09x = 309,089.39 × 131,413.78
  4. Step 4: Simplify right side
    206,898.09x = 40,618,605,097.79
  5. Step 5: Solve for x
    x = 40,618,605,097.79/206,898.09
  6. Step 6: Final answer
    x = 196,321.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.