Home / 78,121.09-117,163.05-33,723.55

Finding the Fourth Proportional to 78,121.09, 117,163.05 and 33,723.55

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Solution

The fourth proportional to 78,121.09, 117,163.05 and 33,723.55 is: 50,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.09 : 117,163.05 = 33,723.55 : x
  2. Step 2: Convert to fraction form
    78,121.09/117,163.05 = 33,723.55/x
  3. Step 3: Cross multiply
    78,121.09x = 117,163.05 × 33,723.55
  4. Step 4: Simplify right side
    78,121.09x = 3,951,153,974.83
  5. Step 5: Solve for x
    x = 3,951,153,974.83/78,121.09
  6. Step 6: Final answer
    x = 50,577.30

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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.