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Finding the Fourth Proportional to 215,911.86, 323,889.39 and 66,150.42

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Solution

The fourth proportional to 215,911.86, 323,889.39 and 66,150.42 is: 99,232.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,911.86 : 323,889.39 = 66,150.42 : x
  2. Step 2: Convert to fraction form
    215,911.86/323,889.39 = 66,150.42/x
  3. Step 3: Cross multiply
    215,911.86x = 323,889.39 × 66,150.42
  4. Step 4: Simplify right side
    215,911.86x = 21,425,419,182.04
  5. Step 5: Solve for x
    x = 21,425,419,182.04/215,911.86
  6. Step 6: Final answer
    x = 99,232.25

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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.