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Finding the Fourth Proportional to 215,781.93, 323,661.19 and 66,022.24

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Solution

The fourth proportional to 215,781.93, 323,661.19 and 66,022.24 is: 99,029.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,781.93 : 323,661.19 = 66,022.24 : x
  2. Step 2: Convert to fraction form
    215,781.93/323,661.19 = 66,022.24/x
  3. Step 3: Cross multiply
    215,781.93x = 323,661.19 × 66,022.24
  4. Step 4: Simplify right side
    215,781.93x = 21,368,836,764.87
  5. Step 5: Solve for x
    x = 21,368,836,764.87/215,781.93
  6. Step 6: Final answer
    x = 99,029.78

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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.