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Finding the Fourth Proportional to 69,411, 104,119.38 and 20,163

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Solution

The fourth proportional to 69,411, 104,119.38 and 20,163 is: 30,245.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,411 : 104,119.38 = 20,163 : x
  2. Step 2: Convert to fraction form
    69,411/104,119.38 = 20,163/x
  3. Step 3: Cross multiply
    69,411x = 104,119.38 × 20,163
  4. Step 4: Simplify right side
    69,411x = 2,099,359,058.94
  5. Step 5: Solve for x
    x = 2,099,359,058.94/69,411
  6. Step 6: Final answer
    x = 30,245.34

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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.