Home / 78,106.82-117,135.99-28,180.44

Finding the Fourth Proportional to 78,106.82, 117,135.99 and 28,180.44

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Solution

The fourth proportional to 78,106.82, 117,135.99 and 28,180.44 is: 42,261.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.82 : 117,135.99 = 28,180.44 : x
  2. Step 2: Convert to fraction form
    78,106.82/117,135.99 = 28,180.44/x
  3. Step 3: Cross multiply
    78,106.82x = 117,135.99 × 28,180.44
  4. Step 4: Simplify right side
    78,106.82x = 3,300,943,738.04
  5. Step 5: Solve for x
    x = 3,300,943,738.04/78,106.82
  6. Step 6: Final answer
    x = 42,261.92

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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.