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Finding the Fourth Proportional to 68,811.73, 103,217.75 and 18,892.51

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Solution

The fourth proportional to 68,811.73, 103,217.75 and 18,892.51 is: 28,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811.73 : 103,217.75 = 18,892.51 : x
  2. Step 2: Convert to fraction form
    68,811.73/103,217.75 = 18,892.51/x
  3. Step 3: Cross multiply
    68,811.73x = 103,217.75 × 18,892.51
  4. Step 4: Simplify right side
    68,811.73x = 1,950,041,763.50
  5. Step 5: Solve for x
    x = 1,950,041,763.50/68,811.73
  6. Step 6: Final answer
    x = 28,338.80

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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.