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Finding the Fourth Proportional to 68,814.40, 103,224.60 and 18,893.20

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Solution

The fourth proportional to 68,814.40, 103,224.60 and 18,893.20 is: 28,340.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,814.40 : 103,224.60 = 18,893.20 : x
  2. Step 2: Convert to fraction form
    68,814.40/103,224.60 = 18,893.20/x
  3. Step 3: Cross multiply
    68,814.40x = 103,224.60 × 18,893.20
  4. Step 4: Simplify right side
    68,814.40x = 1,950,243,012.72
  5. Step 5: Solve for x
    x = 1,950,243,012.72/68,814.40
  6. Step 6: Final answer
    x = 28,340.62

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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.