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Finding the Fourth Proportional to 69,218.44, 103,837.68 and 21,817.51

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Solution

The fourth proportional to 69,218.44, 103,837.68 and 21,817.51 is: 32,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,218.44 : 103,837.68 = 21,817.51 : x
  2. Step 2: Convert to fraction form
    69,218.44/103,837.68 = 21,817.51/x
  3. Step 3: Cross multiply
    69,218.44x = 103,837.68 × 21,817.51
  4. Step 4: Simplify right side
    69,218.44x = 2,265,479,362.18
  5. Step 5: Solve for x
    x = 2,265,479,362.18/69,218.44
  6. Step 6: Final answer
    x = 32,729.42

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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.