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Finding the Fourth Proportional to 68,705.60, 103,029.60 and 21,945.92

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Solution

The fourth proportional to 68,705.60, 103,029.60 and 21,945.92 is: 32,909.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,705.60 : 103,029.60 = 21,945.92 : x
  2. Step 2: Convert to fraction form
    68,705.60/103,029.60 = 21,945.92/x
  3. Step 3: Cross multiply
    68,705.60x = 103,029.60 × 21,945.92
  4. Step 4: Simplify right side
    68,705.60x = 2,261,079,359.23
  5. Step 5: Solve for x
    x = 2,261,079,359.23/68,705.60
  6. Step 6: Final answer
    x = 32,909.68

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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.