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Finding the Fourth Proportional to 318,119.86, 477,183.57 and 81,456.22

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Solution

The fourth proportional to 318,119.86, 477,183.57 and 81,456.22 is: 122,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,119.86 : 477,183.57 = 81,456.22 : x
  2. Step 2: Convert to fraction form
    318,119.86/477,183.57 = 81,456.22/x
  3. Step 3: Cross multiply
    318,119.86x = 477,183.57 × 81,456.22
  4. Step 4: Simplify right side
    318,119.86x = 38,869,569,858.31
  5. Step 5: Solve for x
    x = 38,869,569,858.31/318,119.86
  6. Step 6: Final answer
    x = 122,185.30

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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.