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Finding the Fourth Proportional to 69,339, 104,025.78 and 20,091

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Solution

The fourth proportional to 69,339, 104,025.78 and 20,091 is: 30,141.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,339 : 104,025.78 = 20,091 : x
  2. Step 2: Convert to fraction form
    69,339/104,025.78 = 20,091/x
  3. Step 3: Cross multiply
    69,339x = 104,025.78 × 20,091
  4. Step 4: Simplify right side
    69,339x = 2,089,981,945.98
  5. Step 5: Solve for x
    x = 2,089,981,945.98/69,339
  6. Step 6: Final answer
    x = 30,141.51

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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.