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Finding the Fourth Proportional to 189,755.78, 261,852.90 and 104,867.78

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Solution

The fourth proportional to 189,755.78, 261,852.90 and 104,867.78 is: 144,711.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,755.78 : 261,852.90 = 104,867.78 : x
  2. Step 2: Convert to fraction form
    189,755.78/261,852.90 = 104,867.78/x
  3. Step 3: Cross multiply
    189,755.78x = 261,852.90 × 104,867.78
  4. Step 4: Simplify right side
    189,755.78x = 27,459,932,309.56
  5. Step 5: Solve for x
    x = 27,459,932,309.56/189,755.78
  6. Step 6: Final answer
    x = 144,711.97

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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.