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Finding the Fourth Proportional to 217,008.78, 325,203 and 122,039.64

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Solution

The fourth proportional to 217,008.78, 325,203 and 122,039.64 is: 182,885.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,008.78 : 325,203 = 122,039.64 : x
  2. Step 2: Convert to fraction form
    217,008.78/325,203 = 122,039.64/x
  3. Step 3: Cross multiply
    217,008.78x = 325,203 × 122,039.64
  4. Step 4: Simplify right side
    217,008.78x = 39,687,657,046.92
  5. Step 5: Solve for x
    x = 39,687,657,046.92/217,008.78
  6. Step 6: Final answer
    x = 182,885.03

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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.