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Finding the Fourth Proportional to 68,842.91, 103,265.50 and 18,922.70

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Solution

The fourth proportional to 68,842.91, 103,265.50 and 18,922.70 is: 28,384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,842.91 : 103,265.50 = 18,922.70 : x
  2. Step 2: Convert to fraction form
    68,842.91/103,265.50 = 18,922.70/x
  3. Step 3: Cross multiply
    68,842.91x = 103,265.50 × 18,922.70
  4. Step 4: Simplify right side
    68,842.91x = 1,954,061,513.22
  5. Step 5: Solve for x
    x = 1,954,061,513.22/68,842.91
  6. Step 6: Final answer
    x = 28,384.36

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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.