Home / 87,431.60-131,212.20-57,839.60

Finding the Fourth Proportional to 87,431.60, 131,212.20 and 57,839.60

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Solution

The fourth proportional to 87,431.60, 131,212.20 and 57,839.60 is: 86,802.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,431.60 : 131,212.20 = 57,839.60 : x
  2. Step 2: Convert to fraction form
    87,431.60/131,212.20 = 57,839.60/x
  3. Step 3: Cross multiply
    87,431.60x = 131,212.20 × 57,839.60
  4. Step 4: Simplify right side
    87,431.60x = 7,589,261,163.12
  5. Step 5: Solve for x
    x = 7,589,261,163.12/87,431.60
  6. Step 6: Final answer
    x = 86,802.27

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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.