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Finding the Fourth Proportional to 189,679.76, 261,735.76 and 104,791.76

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Solution

The fourth proportional to 189,679.76, 261,735.76 and 104,791.76 is: 144,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,679.76 : 261,735.76 = 104,791.76 : x
  2. Step 2: Convert to fraction form
    189,679.76/261,735.76 = 104,791.76/x
  3. Step 3: Cross multiply
    189,679.76x = 261,735.76 × 104,791.76
  4. Step 4: Simplify right side
    189,679.76x = 27,427,750,945.34
  5. Step 5: Solve for x
    x = 27,427,750,945.34/189,679.76
  6. Step 6: Final answer
    x = 144,600.30

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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.