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Finding the Fourth Proportional to 68,040.12, 102,067.86 and 28,589.88

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Solution

The fourth proportional to 68,040.12, 102,067.86 and 28,589.88 is: 42,888.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,040.12 : 102,067.86 = 28,589.88 : x
  2. Step 2: Convert to fraction form
    68,040.12/102,067.86 = 28,589.88/x
  3. Step 3: Cross multiply
    68,040.12x = 102,067.86 × 28,589.88
  4. Step 4: Simplify right side
    68,040.12x = 2,918,107,869.26
  5. Step 5: Solve for x
    x = 2,918,107,869.26/68,040.12
  6. Step 6: Final answer
    x = 42,888.05

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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.