Home / 198,540.80-297,643.60-86,136.28

Finding the Fourth Proportional to 198,540.80, 297,643.60 and 86,136.28

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Solution

The fourth proportional to 198,540.80, 297,643.60 and 86,136.28 is: 129,131.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,540.80 : 297,643.60 = 86,136.28 : x
  2. Step 2: Convert to fraction form
    198,540.80/297,643.60 = 86,136.28/x
  3. Step 3: Cross multiply
    198,540.80x = 297,643.60 × 86,136.28
  4. Step 4: Simplify right side
    198,540.80x = 25,637,912,469.81
  5. Step 5: Solve for x
    x = 25,637,912,469.81/198,540.80
  6. Step 6: Final answer
    x = 129,131.71

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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.