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Finding the Fourth Proportional to 69,791.37, 104,647.28 and 47,631.57

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Solution

The fourth proportional to 69,791.37, 104,647.28 and 47,631.57 is: 71,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,791.37 : 104,647.28 = 47,631.57 : x
  2. Step 2: Convert to fraction form
    69,791.37/104,647.28 = 47,631.57/x
  3. Step 3: Cross multiply
    69,791.37x = 104,647.28 × 47,631.57
  4. Step 4: Simplify right side
    69,791.37x = 4,984,514,004.47
  5. Step 5: Solve for x
    x = 4,984,514,004.47/69,791.37
  6. Step 6: Final answer
    x = 71,420.21

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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.