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Finding the Fourth Proportional to 201,003.40, 301,067.70 and 121,979.80

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Solution

The fourth proportional to 201,003.40, 301,067.70 and 121,979.80 is: 182,704.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,003.40 : 301,067.70 = 121,979.80 : x
  2. Step 2: Convert to fraction form
    201,003.40/301,067.70 = 121,979.80/x
  3. Step 3: Cross multiply
    201,003.40x = 301,067.70 × 121,979.80
  4. Step 4: Simplify right side
    201,003.40x = 36,724,177,832.46
  5. Step 5: Solve for x
    x = 36,724,177,832.46/201,003.40
  6. Step 6: Final answer
    x = 182,704.26

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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.