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Finding the Fourth Proportional to 69,141.65, 103,713.78 and 21,755.84

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Solution

The fourth proportional to 69,141.65, 103,713.78 and 21,755.84 is: 32,634.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,141.65 : 103,713.78 = 21,755.84 : x
  2. Step 2: Convert to fraction form
    69,141.65/103,713.78 = 21,755.84/x
  3. Step 3: Cross multiply
    69,141.65x = 103,713.78 × 21,755.84
  4. Step 4: Simplify right side
    69,141.65x = 2,256,379,884.91
  5. Step 5: Solve for x
    x = 2,256,379,884.91/69,141.65
  6. Step 6: Final answer
    x = 32,634.17

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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.