Home / 78,067.24-117,121.98-28,152.88

Finding the Fourth Proportional to 78,067.24, 117,121.98 and 28,152.88

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Solution

The fourth proportional to 78,067.24, 117,121.98 and 28,152.88 is: 42,236.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067.24 : 117,121.98 = 28,152.88 : x
  2. Step 2: Convert to fraction form
    78,067.24/117,121.98 = 28,152.88/x
  3. Step 3: Cross multiply
    78,067.24x = 117,121.98 × 28,152.88
  4. Step 4: Simplify right side
    78,067.24x = 3,297,321,048.30
  5. Step 5: Solve for x
    x = 3,297,321,048.30/78,067.24
  6. Step 6: Final answer
    x = 42,236.94

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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.