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Finding the Fourth Proportional to 68,796.88, 103,188.40 and 18,882

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Solution

The fourth proportional to 68,796.88, 103,188.40 and 18,882 is: 28,321.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,796.88 : 103,188.40 = 18,882 : x
  2. Step 2: Convert to fraction form
    68,796.88/103,188.40 = 18,882/x
  3. Step 3: Cross multiply
    68,796.88x = 103,188.40 × 18,882
  4. Step 4: Simplify right side
    68,796.88x = 1,948,403,368.80
  5. Step 5: Solve for x
    x = 1,948,403,368.80/68,796.88
  6. Step 6: Final answer
    x = 28,321.10

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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.