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Finding the Fourth Proportional to 321,302.92, 481,950.88 and 131,721

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Solution

The fourth proportional to 321,302.92, 481,950.88 and 131,721 is: 197,580.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,302.92 : 481,950.88 = 131,721 : x
  2. Step 2: Convert to fraction form
    321,302.92/481,950.88 = 131,721/x
  3. Step 3: Cross multiply
    321,302.92x = 481,950.88 × 131,721
  4. Step 4: Simplify right side
    321,302.92x = 63,483,051,864.48
  5. Step 5: Solve for x
    x = 63,483,051,864.48/321,302.92
  6. Step 6: Final answer
    x = 197,580.07

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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.