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Finding the Fourth Proportional to 68,775.21, 103,144.12 and 18,843.26

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Solution

The fourth proportional to 68,775.21, 103,144.12 and 18,843.26 is: 28,259.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,775.21 : 103,144.12 = 18,843.26 : x
  2. Step 2: Convert to fraction form
    68,775.21/103,144.12 = 18,843.26/x
  3. Step 3: Cross multiply
    68,775.21x = 103,144.12 × 18,843.26
  4. Step 4: Simplify right side
    68,775.21x = 1,943,570,907.80
  5. Step 5: Solve for x
    x = 1,943,570,907.80/68,775.21
  6. Step 6: Final answer
    x = 28,259.76

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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.