Home / 205,986.20-308,979.30-72,870.80

Finding the Fourth Proportional to 205,986.20, 308,979.30 and 72,870.80

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Solution

The fourth proportional to 205,986.20, 308,979.30 and 72,870.80 is: 109,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,986.20 : 308,979.30 = 72,870.80 : x
  2. Step 2: Convert to fraction form
    205,986.20/308,979.30 = 72,870.80/x
  3. Step 3: Cross multiply
    205,986.20x = 308,979.30 × 72,870.80
  4. Step 4: Simplify right side
    205,986.20x = 22,515,568,774.44
  5. Step 5: Solve for x
    x = 22,515,568,774.44/205,986.20
  6. Step 6: Final answer
    x = 109,306.20

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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.