Home / 78,947.78-118,505.97-33,991.38

Finding the Fourth Proportional to 78,947.78, 118,505.97 and 33,991.38

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Solution

The fourth proportional to 78,947.78, 118,505.97 and 33,991.38 is: 51,023.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.78 : 118,505.97 = 33,991.38 : x
  2. Step 2: Convert to fraction form
    78,947.78/118,505.97 = 33,991.38/x
  3. Step 3: Cross multiply
    78,947.78x = 118,505.97 × 33,991.38
  4. Step 4: Simplify right side
    78,947.78x = 4,028,181,458.54
  5. Step 5: Solve for x
    x = 4,028,181,458.54/78,947.78
  6. Step 6: Final answer
    x = 51,023.37

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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.