Home / 198,639.76-297,958.92-80,309.68

Finding the Fourth Proportional to 198,639.76, 297,958.92 and 80,309.68

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Solution

The fourth proportional to 198,639.76, 297,958.92 and 80,309.68 is: 120,464.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,639.76 : 297,958.92 = 80,309.68 : x
  2. Step 2: Convert to fraction form
    198,639.76/297,958.92 = 80,309.68/x
  3. Step 3: Cross multiply
    198,639.76x = 297,958.92 × 80,309.68
  4. Step 4: Simplify right side
    198,639.76x = 23,928,985,518.35
  5. Step 5: Solve for x
    x = 23,928,985,518.35/198,639.76
  6. Step 6: Final answer
    x = 120,464.23

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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.