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Finding the Fourth Proportional to 68,806.02, 103,209.10 and 18,886.80

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Solution

The fourth proportional to 68,806.02, 103,209.10 and 18,886.80 is: 28,330.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,806.02 : 103,209.10 = 18,886.80 : x
  2. Step 2: Convert to fraction form
    68,806.02/103,209.10 = 18,886.80/x
  3. Step 3: Cross multiply
    68,806.02x = 103,209.10 × 18,886.80
  4. Step 4: Simplify right side
    68,806.02x = 1,949,289,629.88
  5. Step 5: Solve for x
    x = 1,949,289,629.88/68,806.02
  6. Step 6: Final answer
    x = 28,330.22

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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.