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Finding the Fourth Proportional to 68,679.60, 103,026.96 and 21,921.60

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Solution

The fourth proportional to 68,679.60, 103,026.96 and 21,921.60 is: 32,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.60 : 103,026.96 = 21,921.60 : x
  2. Step 2: Convert to fraction form
    68,679.60/103,026.96 = 21,921.60/x
  3. Step 3: Cross multiply
    68,679.60x = 103,026.96 × 21,921.60
  4. Step 4: Simplify right side
    68,679.60x = 2,258,515,806.34
  5. Step 5: Solve for x
    x = 2,258,515,806.34/68,679.60
  6. Step 6: Final answer
    x = 32,884.81

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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.