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Finding the Fourth Proportional to 68,997.21, 103,495.82 and 21,612.71

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Solution

The fourth proportional to 68,997.21, 103,495.82 and 21,612.71 is: 32,419.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,997.21 : 103,495.82 = 21,612.71 : x
  2. Step 2: Convert to fraction form
    68,997.21/103,495.82 = 21,612.71/x
  3. Step 3: Cross multiply
    68,997.21x = 103,495.82 × 21,612.71
  4. Step 4: Simplify right side
    68,997.21x = 2,236,825,143.87
  5. Step 5: Solve for x
    x = 2,236,825,143.87/68,997.21
  6. Step 6: Final answer
    x = 32,419.07

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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.