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Finding the Fourth Proportional to 217,630.94, 300,340.06 and 120,834.79

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Solution

The fourth proportional to 217,630.94, 300,340.06 and 120,834.79 is: 166,757.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,630.94 : 300,340.06 = 120,834.79 : x
  2. Step 2: Convert to fraction form
    217,630.94/300,340.06 = 120,834.79/x
  3. Step 3: Cross multiply
    217,630.94x = 300,340.06 × 120,834.79
  4. Step 4: Simplify right side
    217,630.94x = 36,291,527,025.75
  5. Step 5: Solve for x
    x = 36,291,527,025.75/217,630.94
  6. Step 6: Final answer
    x = 166,757.21

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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.