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Finding the Fourth Proportional to 318,351.44, 477,544.18 and 81,696.16

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Solution

The fourth proportional to 318,351.44, 477,544.18 and 81,696.16 is: 122,548.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,351.44 : 477,544.18 = 81,696.16 : x
  2. Step 2: Convert to fraction form
    318,351.44/477,544.18 = 81,696.16/x
  3. Step 3: Cross multiply
    318,351.44x = 477,544.18 × 81,696.16
  4. Step 4: Simplify right side
    318,351.44x = 39,013,525,736.35
  5. Step 5: Solve for x
    x = 39,013,525,736.35/318,351.44
  6. Step 6: Final answer
    x = 122,548.61

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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.