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Finding the Fourth Proportional to 68,989.39, 103,484.08 and 21,608.18

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Solution

The fourth proportional to 68,989.39, 103,484.08 and 21,608.18 is: 32,412.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,989.39 : 103,484.08 = 21,608.18 : x
  2. Step 2: Convert to fraction form
    68,989.39/103,484.08 = 21,608.18/x
  3. Step 3: Cross multiply
    68,989.39x = 103,484.08 × 21,608.18
  4. Step 4: Simplify right side
    68,989.39x = 2,236,103,107.53
  5. Step 5: Solve for x
    x = 2,236,103,107.53/68,989.39
  6. Step 6: Final answer
    x = 32,412.28

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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.