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Finding the Fourth Proportional to 217,951.08, 300,906.66 and 172,811.40

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Solution

The fourth proportional to 217,951.08, 300,906.66 and 172,811.40 is: 238,586.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,951.08 : 300,906.66 = 172,811.40 : x
  2. Step 2: Convert to fraction form
    217,951.08/300,906.66 = 172,811.40/x
  3. Step 3: Cross multiply
    217,951.08x = 300,906.66 × 172,811.40
  4. Step 4: Simplify right side
    217,951.08x = 52,000,101,183.92
  5. Step 5: Solve for x
    x = 52,000,101,183.92/217,951.08
  6. Step 6: Final answer
    x = 238,586.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.