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Finding the Fourth Proportional to 69,439, 104,176.14 and 20,191

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Solution

The fourth proportional to 69,439, 104,176.14 and 20,191 is: 30,291.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,439 : 104,176.14 = 20,191 : x
  2. Step 2: Convert to fraction form
    69,439/104,176.14 = 20,191/x
  3. Step 3: Cross multiply
    69,439x = 104,176.14 × 20,191
  4. Step 4: Simplify right side
    69,439x = 2,103,420,442.74
  5. Step 5: Solve for x
    x = 2,103,420,442.74/69,439
  6. Step 6: Final answer
    x = 30,291.63

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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.