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Finding the Fourth Proportional to 321,046.70, 481,570.20 and 81,161.33

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Solution

The fourth proportional to 321,046.70, 481,570.20 and 81,161.33 is: 121,742.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,046.70 : 481,570.20 = 81,161.33 : x
  2. Step 2: Convert to fraction form
    321,046.70/481,570.20 = 81,161.33/x
  3. Step 3: Cross multiply
    321,046.70x = 481,570.20 × 81,161.33
  4. Step 4: Simplify right side
    321,046.70x = 39,084,875,512.52
  5. Step 5: Solve for x
    x = 39,084,875,512.52/321,046.70
  6. Step 6: Final answer
    x = 121,742.03

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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.