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Finding the Fourth Proportional to 68,915.88, 103,308.16 and 22,135.92

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Solution

The fourth proportional to 68,915.88, 103,308.16 and 22,135.92 is: 33,182.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,915.88 : 103,308.16 = 22,135.92 : x
  2. Step 2: Convert to fraction form
    68,915.88/103,308.16 = 22,135.92/x
  3. Step 3: Cross multiply
    68,915.88x = 103,308.16 × 22,135.92
  4. Step 4: Simplify right side
    68,915.88x = 2,286,821,165.11
  5. Step 5: Solve for x
    x = 2,286,821,165.11/68,915.88
  6. Step 6: Final answer
    x = 33,182.79

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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.