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Finding the Fourth Proportional to 69,021.88, 103,537.17 and 18,419.95

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Solution

The fourth proportional to 69,021.88, 103,537.17 and 18,419.95 is: 27,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,021.88 : 103,537.17 = 18,419.95 : x
  2. Step 2: Convert to fraction form
    69,021.88/103,537.17 = 18,419.95/x
  3. Step 3: Cross multiply
    69,021.88x = 103,537.17 × 18,419.95
  4. Step 4: Simplify right side
    69,021.88x = 1,907,149,494.54
  5. Step 5: Solve for x
    x = 1,907,149,494.54/69,021.88
  6. Step 6: Final answer
    x = 27,631.09

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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.