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Finding the Fourth Proportional to 217,635.30, 326,712.15 and 122,940.90

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Solution

The fourth proportional to 217,635.30, 326,712.15 and 122,940.90 is: 184,557.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,635.30 : 326,712.15 = 122,940.90 : x
  2. Step 2: Convert to fraction form
    217,635.30/326,712.15 = 122,940.90/x
  3. Step 3: Cross multiply
    217,635.30x = 326,712.15 × 122,940.90
  4. Step 4: Simplify right side
    217,635.30x = 40,166,285,761.94
  5. Step 5: Solve for x
    x = 40,166,285,761.94/217,635.30
  6. Step 6: Final answer
    x = 184,557.77

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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.