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Finding the Fourth Proportional to 68,091.26, 102,136.92 and 21,347.78

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Solution

The fourth proportional to 68,091.26, 102,136.92 and 21,347.78 is: 32,021.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,091.26 : 102,136.92 = 21,347.78 : x
  2. Step 2: Convert to fraction form
    68,091.26/102,136.92 = 21,347.78/x
  3. Step 3: Cross multiply
    68,091.26x = 102,136.92 × 21,347.78
  4. Step 4: Simplify right side
    68,091.26x = 2,180,396,498.04
  5. Step 5: Solve for x
    x = 2,180,396,498.04/68,091.26
  6. Step 6: Final answer
    x = 32,021.68

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1.5x scale

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.