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Finding the Fourth Proportional to 68,627.20, 102,739.20 and 51,174.40

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Solution

The fourth proportional to 68,627.20, 102,739.20 and 51,174.40 is: 76,611.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,627.20 : 102,739.20 = 51,174.40 : x
  2. Step 2: Convert to fraction form
    68,627.20/102,739.20 = 51,174.40/x
  3. Step 3: Cross multiply
    68,627.20x = 102,739.20 × 51,174.40
  4. Step 4: Simplify right side
    68,627.20x = 5,257,616,916.48
  5. Step 5: Solve for x
    x = 5,257,616,916.48/68,627.20
  6. Step 6: Final answer
    x = 76,611.27

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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.