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Finding the Fourth Proportional to 68,625.20, 102,736.20 and 51,172.40

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Solution

The fourth proportional to 68,625.20, 102,736.20 and 51,172.40 is: 76,608.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,625.20 : 102,736.20 = 51,172.40 : x
  2. Step 2: Convert to fraction form
    68,625.20/102,736.20 = 51,172.40/x
  3. Step 3: Cross multiply
    68,625.20x = 102,736.20 × 51,172.40
  4. Step 4: Simplify right side
    68,625.20x = 5,257,257,920.88
  5. Step 5: Solve for x
    x = 5,257,257,920.88/68,625.20
  6. Step 6: Final answer
    x = 76,608.27

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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.