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Finding the Fourth Proportional to 68,836.03, 103,255.19 and 18,915.82

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Solution

The fourth proportional to 68,836.03, 103,255.19 and 18,915.82 is: 28,374.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,836.03 : 103,255.19 = 18,915.82 : x
  2. Step 2: Convert to fraction form
    68,836.03/103,255.19 = 18,915.82/x
  3. Step 3: Cross multiply
    68,836.03x = 103,255.19 × 18,915.82
  4. Step 4: Simplify right side
    68,836.03x = 1,953,156,540.82
  5. Step 5: Solve for x
    x = 1,953,156,540.82/68,836.03
  6. Step 6: Final answer
    x = 28,374.04

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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.