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Finding the Fourth Proportional to 321,687.70, 482,648.55 and 111,346.90

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Solution

The fourth proportional to 321,687.70, 482,648.55 and 111,346.90 is: 167,060.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,687.70 : 482,648.55 = 111,346.90 : x
  2. Step 2: Convert to fraction form
    321,687.70/482,648.55 = 111,346.90/x
  3. Step 3: Cross multiply
    321,687.70x = 482,648.55 × 111,346.90
  4. Step 4: Simplify right side
    321,687.70x = 53,741,419,832.00
  5. Step 5: Solve for x
    x = 53,741,419,832.00/321,687.70
  6. Step 6: Final answer
    x = 167,060.85

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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.