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Finding the Fourth Proportional to 189,201.77, 261,100.21 and 104,321.85

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Solution

The fourth proportional to 189,201.77, 261,100.21 and 104,321.85 is: 143,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,201.77 : 261,100.21 = 104,321.85 : x
  2. Step 2: Convert to fraction form
    189,201.77/261,100.21 = 104,321.85/x
  3. Step 3: Cross multiply
    189,201.77x = 261,100.21 × 104,321.85
  4. Step 4: Simplify right side
    189,201.77x = 27,238,456,942.59
  5. Step 5: Solve for x
    x = 27,238,456,942.59/189,201.77
  6. Step 6: Final answer
    x = 143,965.13

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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.