Home / 198,619.20-297,669.60-91,990.80

Finding the Fourth Proportional to 198,619.20, 297,669.60 and 91,990.80

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Solution

The fourth proportional to 198,619.20, 297,669.60 and 91,990.80 is: 137,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,619.20 : 297,669.60 = 91,990.80 : x
  2. Step 2: Convert to fraction form
    198,619.20/297,669.60 = 91,990.80/x
  3. Step 3: Cross multiply
    198,619.20x = 297,669.60 × 91,990.80
  4. Step 4: Simplify right side
    198,619.20x = 27,382,864,639.68
  5. Step 5: Solve for x
    x = 27,382,864,639.68/198,619.20
  6. Step 6: Final answer
    x = 137,866.15

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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.