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Finding the Fourth Proportional to 69,049.71, 103,563.03 and 19,134.87

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Solution

The fourth proportional to 69,049.71, 103,563.03 and 19,134.87 is: 28,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,049.71 : 103,563.03 = 19,134.87 : x
  2. Step 2: Convert to fraction form
    69,049.71/103,563.03 = 19,134.87/x
  3. Step 3: Cross multiply
    69,049.71x = 103,563.03 × 19,134.87
  4. Step 4: Simplify right side
    69,049.71x = 1,981,665,115.86
  5. Step 5: Solve for x
    x = 1,981,665,115.86/69,049.71
  6. Step 6: Final answer
    x = 28,699.11

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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.