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Finding the Fourth Proportional to 321,015.60, 481,177.80 and 121,258.80

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Solution

The fourth proportional to 321,015.60, 481,177.80 and 121,258.80 is: 181,757.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,015.60 : 481,177.80 = 121,258.80 : x
  2. Step 2: Convert to fraction form
    321,015.60/481,177.80 = 121,258.80/x
  3. Step 3: Cross multiply
    321,015.60x = 481,177.80 × 121,258.80
  4. Step 4: Simplify right side
    321,015.60x = 58,347,042,614.64
  5. Step 5: Solve for x
    x = 58,347,042,614.64/321,015.60
  6. Step 6: Final answer
    x = 181,757.65

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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.