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Finding the Fourth Proportional to 68,788.16, 103,180.08 and 19,540.16

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Solution

The fourth proportional to 68,788.16, 103,180.08 and 19,540.16 is: 29,309.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,788.16 : 103,180.08 = 19,540.16 : x
  2. Step 2: Convert to fraction form
    68,788.16/103,180.08 = 19,540.16/x
  3. Step 3: Cross multiply
    68,788.16x = 103,180.08 × 19,540.16
  4. Step 4: Simplify right side
    68,788.16x = 2,016,155,272.01
  5. Step 5: Solve for x
    x = 2,016,155,272.01/68,788.16
  6. Step 6: Final answer
    x = 29,309.63

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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.