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Finding the Fourth Proportional to 378,129.90, 567,315.09 and 111,891.72

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Solution

The fourth proportional to 378,129.90, 567,315.09 and 111,891.72 is: 167,873.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,129.90 : 567,315.09 = 111,891.72 : x
  2. Step 2: Convert to fraction form
    378,129.90/567,315.09 = 111,891.72/x
  3. Step 3: Cross multiply
    378,129.90x = 567,315.09 × 111,891.72
  4. Step 4: Simplify right side
    378,129.90x = 63,477,861,202.05
  5. Step 5: Solve for x
    x = 63,477,861,202.05/378,129.90
  6. Step 6: Final answer
    x = 167,873.16

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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.