Home / 78,067.44-117,064.71-28,140.96

Finding the Fourth Proportional to 78,067.44, 117,064.71 and 28,140.96

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Solution

The fourth proportional to 78,067.44, 117,064.71 and 28,140.96 is: 42,198.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067.44 : 117,064.71 = 28,140.96 : x
  2. Step 2: Convert to fraction form
    78,067.44/117,064.71 = 28,140.96/x
  3. Step 3: Cross multiply
    78,067.44x = 117,064.71 × 28,140.96
  4. Step 4: Simplify right side
    78,067.44x = 3,294,313,321.52
  5. Step 5: Solve for x
    x = 3,294,313,321.52/78,067.44
  6. Step 6: Final answer
    x = 42,198.30

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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.