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Finding the Fourth Proportional to 189,163.52, 261,016.80 and 112,659.20

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Solution

The fourth proportional to 189,163.52, 261,016.80 and 112,659.20 is: 155,452.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,163.52 : 261,016.80 = 112,659.20 : x
  2. Step 2: Convert to fraction form
    189,163.52/261,016.80 = 112,659.20/x
  3. Step 3: Cross multiply
    189,163.52x = 261,016.80 × 112,659.20
  4. Step 4: Simplify right side
    189,163.52x = 29,405,943,874.56
  5. Step 5: Solve for x
    x = 29,405,943,874.56/189,163.52
  6. Step 6: Final answer
    x = 155,452.51

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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.