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Finding the Fourth Proportional to 143,571.39, 215,387.85 and 43,739.62

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Solution

The fourth proportional to 143,571.39, 215,387.85 and 43,739.62 is: 65,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,571.39 : 215,387.85 = 43,739.62 : x
  2. Step 2: Convert to fraction form
    143,571.39/215,387.85 = 43,739.62/x
  3. Step 3: Cross multiply
    143,571.39x = 215,387.85 × 43,739.62
  4. Step 4: Simplify right side
    143,571.39x = 9,420,982,711.62
  5. Step 5: Solve for x
    x = 9,420,982,711.62/143,571.39
  6. Step 6: Final answer
    x = 65,618.80

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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.