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Finding the Fourth Proportional to 68,679.34, 103,002.40 and 18,759.69

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Solution

The fourth proportional to 68,679.34, 103,002.40 and 18,759.69 is: 28,135.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.34 : 103,002.40 = 18,759.69 : x
  2. Step 2: Convert to fraction form
    68,679.34/103,002.40 = 18,759.69/x
  3. Step 3: Cross multiply
    68,679.34x = 103,002.40 × 18,759.69
  4. Step 4: Simplify right side
    68,679.34x = 1,932,293,046.36
  5. Step 5: Solve for x
    x = 1,932,293,046.36/68,679.34
  6. Step 6: Final answer
    x = 28,135.00

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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.