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Finding the Fourth Proportional to 217,808.43, 300,571.72 and 121,012.72

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Solution

The fourth proportional to 217,808.43, 300,571.72 and 121,012.72 is: 166,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,808.43 : 300,571.72 = 121,012.72 : x
  2. Step 2: Convert to fraction form
    217,808.43/300,571.72 = 121,012.72/x
  3. Step 3: Cross multiply
    217,808.43x = 300,571.72 × 121,012.72
  4. Step 4: Simplify right side
    217,808.43x = 36,373,001,392.28
  5. Step 5: Solve for x
    x = 36,373,001,392.28/217,808.43
  6. Step 6: Final answer
    x = 166,995.38

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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.