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Finding the Fourth Proportional to 69,163.21, 103,578.48 and 39,491.11

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Solution

The fourth proportional to 69,163.21, 103,578.48 and 39,491.11 is: 59,141.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,163.21 : 103,578.48 = 39,491.11 : x
  2. Step 2: Convert to fraction form
    69,163.21/103,578.48 = 39,491.11/x
  3. Step 3: Cross multiply
    69,163.21x = 103,578.48 × 39,491.11
  4. Step 4: Simplify right side
    69,163.21x = 4,090,429,147.31
  5. Step 5: Solve for x
    x = 4,090,429,147.31/69,163.21
  6. Step 6: Final answer
    x = 59,141.69

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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.