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Finding the Fourth Proportional to 321,270.57, 481,902.38 and 131,688.68

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Solution

The fourth proportional to 321,270.57, 481,902.38 and 131,688.68 is: 197,531.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,270.57 : 481,902.38 = 131,688.68 : x
  2. Step 2: Convert to fraction form
    321,270.57/481,902.38 = 131,688.68/x
  3. Step 3: Cross multiply
    321,270.57x = 481,902.38 × 131,688.68
  4. Step 4: Simplify right side
    321,270.57x = 63,461,085,243.10
  5. Step 5: Solve for x
    x = 63,461,085,243.10/321,270.57
  6. Step 6: Final answer
    x = 197,531.59

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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.