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Finding the Fourth Proportional to 68,706.90, 103,043.75 and 28,704.26

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Solution

The fourth proportional to 68,706.90, 103,043.75 and 28,704.26 is: 43,049.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,706.90 : 103,043.75 = 28,704.26 : x
  2. Step 2: Convert to fraction form
    68,706.90/103,043.75 = 28,704.26/x
  3. Step 3: Cross multiply
    68,706.90x = 103,043.75 × 28,704.26
  4. Step 4: Simplify right side
    68,706.90x = 2,957,794,591.38
  5. Step 5: Solve for x
    x = 2,957,794,591.38/68,706.90
  6. Step 6: Final answer
    x = 43,049.46

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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.