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Finding the Fourth Proportional to 69,120.62, 103,739.27 and 47,760.92

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Solution

The fourth proportional to 69,120.62, 103,739.27 and 47,760.92 is: 71,681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,120.62 : 103,739.27 = 47,760.92 : x
  2. Step 2: Convert to fraction form
    69,120.62/103,739.27 = 47,760.92/x
  3. Step 3: Cross multiply
    69,120.62x = 103,739.27 × 47,760.92
  4. Step 4: Simplify right side
    69,120.62x = 4,954,682,217.83
  5. Step 5: Solve for x
    x = 4,954,682,217.83/69,120.62
  6. Step 6: Final answer
    x = 71,681.69

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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.