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Finding the Fourth Proportional to 68,252.64, 102,379.22 and 20,867.56

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Solution

The fourth proportional to 68,252.64, 102,379.22 and 20,867.56 is: 31,301.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,252.64 : 102,379.22 = 20,867.56 : x
  2. Step 2: Convert to fraction form
    68,252.64/102,379.22 = 20,867.56/x
  3. Step 3: Cross multiply
    68,252.64x = 102,379.22 × 20,867.56
  4. Step 4: Simplify right side
    68,252.64x = 2,136,404,516.10
  5. Step 5: Solve for x
    x = 2,136,404,516.10/68,252.64
  6. Step 6: Final answer
    x = 31,301.42

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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.