Home / 198,786.65-298,178.61-80,456.28

Finding the Fourth Proportional to 198,786.65, 298,178.61 and 80,456.28

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Solution

The fourth proportional to 198,786.65, 298,178.61 and 80,456.28 is: 120,683.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,786.65 : 298,178.61 = 80,456.28 : x
  2. Step 2: Convert to fraction form
    198,786.65/298,178.61 = 80,456.28/x
  3. Step 3: Cross multiply
    198,786.65x = 298,178.61 × 80,456.28
  4. Step 4: Simplify right side
    198,786.65x = 23,990,342,854.34
  5. Step 5: Solve for x
    x = 23,990,342,854.34/198,786.65
  6. Step 6: Final answer
    x = 120,683.87

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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.