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Finding the Fourth Proportional to 69,131.79, 103,759.49 and 35,420.80

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Solution

The fourth proportional to 69,131.79, 103,759.49 and 35,420.80 is: 53,162.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,131.79 : 103,759.49 = 35,420.80 : x
  2. Step 2: Convert to fraction form
    69,131.79/103,759.49 = 35,420.80/x
  3. Step 3: Cross multiply
    69,131.79x = 103,759.49 × 35,420.80
  4. Step 4: Simplify right side
    69,131.79x = 3,675,244,143.39
  5. Step 5: Solve for x
    x = 3,675,244,143.39/69,131.79
  6. Step 6: Final answer
    x = 53,162.87

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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.