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Finding the Fourth Proportional to 68,804.75, 103,221.94 and 21,418.84

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Solution

The fourth proportional to 68,804.75, 103,221.94 and 21,418.84 is: 32,132.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,804.75 : 103,221.94 = 21,418.84 : x
  2. Step 2: Convert to fraction form
    68,804.75/103,221.94 = 21,418.84/x
  3. Step 3: Cross multiply
    68,804.75x = 103,221.94 × 21,418.84
  4. Step 4: Simplify right side
    68,804.75x = 2,210,894,217.35
  5. Step 5: Solve for x
    x = 2,210,894,217.35/68,804.75
  6. Step 6: Final answer
    x = 32,132.87

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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.