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Finding the Fourth Proportional to 71,679.92, 107,519.76 and 19,089.56

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Solution

The fourth proportional to 71,679.92, 107,519.76 and 19,089.56 is: 28,634.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,679.92 : 107,519.76 = 19,089.56 : x
  2. Step 2: Convert to fraction form
    71,679.92/107,519.76 = 19,089.56/x
  3. Step 3: Cross multiply
    71,679.92x = 107,519.76 × 19,089.56
  4. Step 4: Simplify right side
    71,679.92x = 2,052,504,909.71
  5. Step 5: Solve for x
    x = 2,052,504,909.71/71,679.92
  6. Step 6: Final answer
    x = 28,634.31

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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.