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Finding the Fourth Proportional to 68,752.91, 103,129.45 and 18,833.44

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Solution

The fourth proportional to 68,752.91, 103,129.45 and 18,833.44 is: 28,250.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,752.91 : 103,129.45 = 18,833.44 : x
  2. Step 2: Convert to fraction form
    68,752.91/103,129.45 = 18,833.44/x
  3. Step 3: Cross multiply
    68,752.91x = 103,129.45 × 18,833.44
  4. Step 4: Simplify right side
    68,752.91x = 1,942,281,893.97
  5. Step 5: Solve for x
    x = 1,942,281,893.97/68,752.91
  6. Step 6: Final answer
    x = 28,250.18

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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.