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Finding the Fourth Proportional to 189,687.26, 261,773.70 and 104,809.79

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Solution

The fourth proportional to 189,687.26, 261,773.70 and 104,809.79 is: 144,640.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,687.26 : 261,773.70 = 104,809.79 : x
  2. Step 2: Convert to fraction form
    189,687.26/261,773.70 = 104,809.79/x
  3. Step 3: Cross multiply
    189,687.26x = 261,773.70 × 104,809.79
  4. Step 4: Simplify right side
    189,687.26x = 27,436,446,524.52
  5. Step 5: Solve for x
    x = 27,436,446,524.52/189,687.26
  6. Step 6: Final answer
    x = 144,640.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.