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Finding the Fourth Proportional to 217,820.64, 326,719.20 and 68,043.73

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Solution

The fourth proportional to 217,820.64, 326,719.20 and 68,043.73 is: 102,061.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,820.64 : 326,719.20 = 68,043.73 : x
  2. Step 2: Convert to fraction form
    217,820.64/326,719.20 = 68,043.73/x
  3. Step 3: Cross multiply
    217,820.64x = 326,719.20 × 68,043.73
  4. Step 4: Simplify right side
    217,820.64x = 22,231,193,030.62
  5. Step 5: Solve for x
    x = 22,231,193,030.62/217,820.64
  6. Step 6: Final answer
    x = 102,061.92

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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.