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Finding the Fourth Proportional to 68,491.44, 102,747.15 and 21,110.49

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Solution

The fourth proportional to 68,491.44, 102,747.15 and 21,110.49 is: 31,668.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,491.44 : 102,747.15 = 21,110.49 : x
  2. Step 2: Convert to fraction form
    68,491.44/102,747.15 = 21,110.49/x
  3. Step 3: Cross multiply
    68,491.44x = 102,747.15 × 21,110.49
  4. Step 4: Simplify right side
    68,491.44x = 2,169,042,682.60
  5. Step 5: Solve for x
    x = 2,169,042,682.60/68,491.44
  6. Step 6: Final answer
    x = 31,668.81

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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.