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Finding the Fourth Proportional to 69,502.99, 103,360.36 and 67,288.65

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Solution

The fourth proportional to 69,502.99, 103,360.36 and 67,288.65 is: 100,067.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,502.99 : 103,360.36 = 67,288.65 : x
  2. Step 2: Convert to fraction form
    69,502.99/103,360.36 = 67,288.65/x
  3. Step 3: Cross multiply
    69,502.99x = 103,360.36 × 67,288.65
  4. Step 4: Simplify right side
    69,502.99x = 6,954,978,751.47
  5. Step 5: Solve for x
    x = 6,954,978,751.47/69,502.99
  6. Step 6: Final answer
    x = 100,067.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.