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Finding the Fourth Proportional to 69,125.43, 103,687.45 and 31,674.87

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Solution

The fourth proportional to 69,125.43, 103,687.45 and 31,674.87 is: 47,511.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,125.43 : 103,687.45 = 31,674.87 : x
  2. Step 2: Convert to fraction form
    69,125.43/103,687.45 = 31,674.87/x
  3. Step 3: Cross multiply
    69,125.43x = 103,687.45 × 31,674.87
  4. Step 4: Simplify right side
    69,125.43x = 3,284,286,499.38
  5. Step 5: Solve for x
    x = 3,284,286,499.38/69,125.43
  6. Step 6: Final answer
    x = 47,511.99

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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.