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Finding the Fourth Proportional to 217,969.92, 326,836.32 and 68,145.60

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Solution

The fourth proportional to 217,969.92, 326,836.32 and 68,145.60 is: 102,181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,969.92 : 326,836.32 = 68,145.60 : x
  2. Step 2: Convert to fraction form
    217,969.92/326,836.32 = 68,145.60/x
  3. Step 3: Cross multiply
    217,969.92x = 326,836.32 × 68,145.60
  4. Step 4: Simplify right side
    217,969.92x = 22,272,457,128.19
  5. Step 5: Solve for x
    x = 22,272,457,128.19/217,969.92
  6. Step 6: Final answer
    x = 102,181.33

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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.