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Finding the Fourth Proportional to 69,882.72, 96,440.79 and 39,669.31

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Solution

The fourth proportional to 69,882.72, 96,440.79 and 39,669.31 is: 54,745.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,882.72 : 96,440.79 = 39,669.31 : x
  2. Step 2: Convert to fraction form
    69,882.72/96,440.79 = 39,669.31/x
  3. Step 3: Cross multiply
    69,882.72x = 96,440.79 × 39,669.31
  4. Step 4: Simplify right side
    69,882.72x = 3,825,739,595.15
  5. Step 5: Solve for x
    x = 3,825,739,595.15/69,882.72
  6. Step 6: Final answer
    x = 54,745.14

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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.