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Finding the Fourth Proportional to 69,379.80, 104,038.92 and 31,930.80

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Solution

The fourth proportional to 69,379.80, 104,038.92 and 31,930.80 is: 47,882.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,379.80 : 104,038.92 = 31,930.80 : x
  2. Step 2: Convert to fraction form
    69,379.80/104,038.92 = 31,930.80/x
  3. Step 3: Cross multiply
    69,379.80x = 104,038.92 × 31,930.80
  4. Step 4: Simplify right side
    69,379.80x = 3,322,045,946.74
  5. Step 5: Solve for x
    x = 3,322,045,946.74/69,379.80
  6. Step 6: Final answer
    x = 47,882.03

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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.