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Finding the Fourth Proportional to 378,993.72, 567,868.50 and 129,539.64

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Solution

The fourth proportional to 378,993.72, 567,868.50 and 129,539.64 is: 194,096.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,993.72 : 567,868.50 = 129,539.64 : x
  2. Step 2: Convert to fraction form
    378,993.72/567,868.50 = 129,539.64/x
  3. Step 3: Cross multiply
    378,993.72x = 567,868.50 × 129,539.64
  4. Step 4: Simplify right side
    378,993.72x = 73,561,481,057.34
  5. Step 5: Solve for x
    x = 73,561,481,057.34/378,993.72
  6. Step 6: Final answer
    x = 194,096.83

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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.