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Finding the Fourth Proportional to 318,454.97, 477,682.45 and 81,797.87

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Solution

The fourth proportional to 318,454.97, 477,682.45 and 81,797.87 is: 122,696.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,454.97 : 477,682.45 = 81,797.87 : x
  2. Step 2: Convert to fraction form
    318,454.97/477,682.45 = 81,797.87/x
  3. Step 3: Cross multiply
    318,454.97x = 477,682.45 × 81,797.87
  4. Step 4: Simplify right side
    318,454.97x = 39,073,407,936.09
  5. Step 5: Solve for x
    x = 39,073,407,936.09/318,454.97
  6. Step 6: Final answer
    x = 122,696.81

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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.