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Finding the Fourth Proportional to 318,028,345.62, 477,053,147.25 and 87,978,165.54

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Solution

The fourth proportional to 318,028,345.62, 477,053,147.25 and 87,978,165.54 is: 131,970,188.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,028,345.62 : 477,053,147.25 = 87,978,165.54 : x
  2. Step 2: Convert to fraction form
    318,028,345.62/477,053,147.25 = 87,978,165.54/x
  3. Step 3: Cross multiply
    318,028,345.62x = 477,053,147.25 × 87,978,165.54
  4. Step 4: Simplify right side
    318,028,345.62x = 41,970,260,760,138,496
  5. Step 5: Solve for x
    x = 41,970,260,760,138,496/318,028,345.62
  6. Step 6: Final answer
    x = 131,970,188.63

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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.