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Finding the Fourth Proportional to 68,726.70, 103,104.78 and 21,340.80

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Solution

The fourth proportional to 68,726.70, 103,104.78 and 21,340.80 is: 32,015.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,726.70 : 103,104.78 = 21,340.80 : x
  2. Step 2: Convert to fraction form
    68,726.70/103,104.78 = 21,340.80/x
  3. Step 3: Cross multiply
    68,726.70x = 103,104.78 × 21,340.80
  4. Step 4: Simplify right side
    68,726.70x = 2,200,338,489.02
  5. Step 5: Solve for x
    x = 2,200,338,489.02/68,726.70
  6. Step 6: Final answer
    x = 32,015.77

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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.