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Finding the Fourth Proportional to 69,403, 104,107.38 and 20,155

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Solution

The fourth proportional to 69,403, 104,107.38 and 20,155 is: 30,233.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,403 : 104,107.38 = 20,155 : x
  2. Step 2: Convert to fraction form
    69,403/104,107.38 = 20,155/x
  3. Step 3: Cross multiply
    69,403x = 104,107.38 × 20,155
  4. Step 4: Simplify right side
    69,403x = 2,098,284,243.90
  5. Step 5: Solve for x
    x = 2,098,284,243.90/69,403
  6. Step 6: Final answer
    x = 30,233.34

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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.