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Finding the Fourth Proportional to 320,731.32, 481,059.99 and 84,092.79

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Solution

The fourth proportional to 320,731.32, 481,059.99 and 84,092.79 is: 126,129.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,731.32 : 481,059.99 = 84,092.79 : x
  2. Step 2: Convert to fraction form
    320,731.32/481,059.99 = 84,092.79/x
  3. Step 3: Cross multiply
    320,731.32x = 481,059.99 × 84,092.79
  4. Step 4: Simplify right side
    320,731.32x = 40,453,676,716.47
  5. Step 5: Solve for x
    x = 40,453,676,716.47/320,731.32
  6. Step 6: Final answer
    x = 126,129.49

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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.