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Finding the Fourth Proportional to 69,819.28, 104,713.14 and 19,898.31

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Solution

The fourth proportional to 69,819.28, 104,713.14 and 19,898.31 is: 29,842.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,819.28 : 104,713.14 = 19,898.31 : x
  2. Step 2: Convert to fraction form
    69,819.28/104,713.14 = 19,898.31/x
  3. Step 3: Cross multiply
    69,819.28x = 104,713.14 × 19,898.31
  4. Step 4: Simplify right side
    69,819.28x = 2,083,614,520.79
  5. Step 5: Solve for x
    x = 2,083,614,520.79/69,819.28
  6. Step 6: Final answer
    x = 29,842.97

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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.