Home / 198,788.80-298,183.92-74,128

Finding the Fourth Proportional to 198,788.80, 298,183.92 and 74,128

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Solution

The fourth proportional to 198,788.80, 298,183.92 and 74,128 is: 111,192.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,788.80 : 298,183.92 = 74,128 : x
  2. Step 2: Convert to fraction form
    198,788.80/298,183.92 = 74,128/x
  3. Step 3: Cross multiply
    198,788.80x = 298,183.92 × 74,128
  4. Step 4: Simplify right side
    198,788.80x = 22,103,777,621.76
  5. Step 5: Solve for x
    x = 22,103,777,621.76/198,788.80
  6. Step 6: Final answer
    x = 111,192.27

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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.