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Finding the Fourth Proportional to 321,540.66, 482,276.88 and 132,021

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Solution

The fourth proportional to 321,540.66, 482,276.88 and 132,021 is: 198,017.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,540.66 : 482,276.88 = 132,021 : x
  2. Step 2: Convert to fraction form
    321,540.66/482,276.88 = 132,021/x
  3. Step 3: Cross multiply
    321,540.66x = 482,276.88 × 132,021
  4. Step 4: Simplify right side
    321,540.66x = 63,670,675,974.48
  5. Step 5: Solve for x
    x = 63,670,675,974.48/321,540.66
  6. Step 6: Final answer
    x = 198,017.49

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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.