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Finding the Fourth Proportional to 68,396.62, 102,633.90 and 54,633.10

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Solution

The fourth proportional to 68,396.62, 102,633.90 and 54,633.10 is: 81,980.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,396.62 : 102,633.90 = 54,633.10 : x
  2. Step 2: Convert to fraction form
    68,396.62/102,633.90 = 54,633.10/x
  3. Step 3: Cross multiply
    68,396.62x = 102,633.90 × 54,633.10
  4. Step 4: Simplify right side
    68,396.62x = 5,607,208,122.09
  5. Step 5: Solve for x
    x = 5,607,208,122.09/68,396.62
  6. Step 6: Final answer
    x = 81,980.78

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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.