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Finding the Fourth Proportional to 69,242.25, 103,821.81 and 31,755.36

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Solution

The fourth proportional to 69,242.25, 103,821.81 and 31,755.36 is: 47,613.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,242.25 : 103,821.81 = 31,755.36 : x
  2. Step 2: Convert to fraction form
    69,242.25/103,821.81 = 31,755.36/x
  3. Step 3: Cross multiply
    69,242.25x = 103,821.81 × 31,755.36
  4. Step 4: Simplify right side
    69,242.25x = 3,296,898,952.40
  5. Step 5: Solve for x
    x = 3,296,898,952.40/69,242.25
  6. Step 6: Final answer
    x = 47,613.98

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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.