Home / 128,986.12-193,553.88-54,099.60

Finding the Fourth Proportional to 128,986.12, 193,553.88 and 54,099.60

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Solution

The fourth proportional to 128,986.12, 193,553.88 and 54,099.60 is: 81,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,986.12 : 193,553.88 = 54,099.60 : x
  2. Step 2: Convert to fraction form
    128,986.12/193,553.88 = 54,099.60/x
  3. Step 3: Cross multiply
    128,986.12x = 193,553.88 × 54,099.60
  4. Step 4: Simplify right side
    128,986.12x = 10,471,187,486.45
  5. Step 5: Solve for x
    x = 10,471,187,486.45/128,986.12
  6. Step 6: Final answer
    x = 81,180.73

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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.