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Finding the Fourth Proportional to 69,381.81, 95,747.31 and 39,168.36

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Solution

The fourth proportional to 69,381.81, 95,747.31 and 39,168.36 is: 54,052.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,381.81 : 95,747.31 = 39,168.36 : x
  2. Step 2: Convert to fraction form
    69,381.81/95,747.31 = 39,168.36/x
  3. Step 3: Cross multiply
    69,381.81x = 95,747.31 × 39,168.36
  4. Step 4: Simplify right side
    69,381.81x = 3,750,265,107.11
  5. Step 5: Solve for x
    x = 3,750,265,107.11/69,381.81
  6. Step 6: Final answer
    x = 54,052.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.