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Finding the Fourth Proportional to 168,073.91, 231,936.11 and 91,591.45

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Solution

The fourth proportional to 168,073.91, 231,936.11 and 91,591.45 is: 126,392.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,073.91 : 231,936.11 = 91,591.45 : x
  2. Step 2: Convert to fraction form
    168,073.91/231,936.11 = 91,591.45/x
  3. Step 3: Cross multiply
    168,073.91x = 231,936.11 × 91,591.45
  4. Step 4: Simplify right side
    168,073.91x = 21,243,363,927.93
  5. Step 5: Solve for x
    x = 21,243,363,927.93/168,073.91
  6. Step 6: Final answer
    x = 126,392.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.