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Finding the Fourth Proportional to 189,651.26, 261,717.90 and 104,768.30

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Solution

The fourth proportional to 189,651.26, 261,717.90 and 104,768.30 is: 144,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,651.26 : 261,717.90 = 104,768.30 : x
  2. Step 2: Convert to fraction form
    189,651.26/261,717.90 = 104,768.30/x
  3. Step 3: Cross multiply
    189,651.26x = 261,717.90 × 104,768.30
  4. Step 4: Simplify right side
    189,651.26x = 27,419,739,462.57
  5. Step 5: Solve for x
    x = 27,419,739,462.57/189,651.26
  6. Step 6: Final answer
    x = 144,579.79

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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.