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Finding the Fourth Proportional to 69,711.85, 104,567.54 and 19,791.98

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Solution

The fourth proportional to 69,711.85, 104,567.54 and 19,791.98 is: 29,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,711.85 : 104,567.54 = 19,791.98 : x
  2. Step 2: Convert to fraction form
    69,711.85/104,567.54 = 19,791.98/x
  3. Step 3: Cross multiply
    69,711.85x = 104,567.54 × 19,791.98
  4. Step 4: Simplify right side
    69,711.85x = 2,069,598,186.97
  5. Step 5: Solve for x
    x = 2,069,598,186.97/69,711.85
  6. Step 6: Final answer
    x = 29,687.90

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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.