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Finding the Fourth Proportional to 392,131.56, 588,141.72 and 125,857.62

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Solution

The fourth proportional to 392,131.56, 588,141.72 and 125,857.62 is: 188,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,131.56 : 588,141.72 = 125,857.62 : x
  2. Step 2: Convert to fraction form
    392,131.56/588,141.72 = 125,857.62/x
  3. Step 3: Cross multiply
    392,131.56x = 588,141.72 × 125,857.62
  4. Step 4: Simplify right side
    392,131.56x = 74,022,117,101.91
  5. Step 5: Solve for x
    x = 74,022,117,101.91/392,131.56
  6. Step 6: Final answer
    x = 188,768.58

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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.