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Finding the Fourth Proportional to 215,900.91, 323,773.56 and 91,251.63

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Solution

The fourth proportional to 215,900.91, 323,773.56 and 91,251.63 is: 136,844.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,900.91 : 323,773.56 = 91,251.63 : x
  2. Step 2: Convert to fraction form
    215,900.91/323,773.56 = 91,251.63/x
  3. Step 3: Cross multiply
    215,900.91x = 323,773.56 × 91,251.63
  4. Step 4: Simplify right side
    215,900.91x = 29,544,865,100.90
  5. Step 5: Solve for x
    x = 29,544,865,100.90/215,900.91
  6. Step 6: Final answer
    x = 136,844.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.