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Finding the Fourth Proportional to 84,121.74, 125,924.96 and 54,480.60

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Solution

The fourth proportional to 84,121.74, 125,924.96 and 54,480.60 is: 81,554.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,121.74 : 125,924.96 = 54,480.60 : x
  2. Step 2: Convert to fraction form
    84,121.74/125,924.96 = 54,480.60/x
  3. Step 3: Cross multiply
    84,121.74x = 125,924.96 × 54,480.60
  4. Step 4: Simplify right side
    84,121.74x = 6,860,467,375.78
  5. Step 5: Solve for x
    x = 6,860,467,375.78/84,121.74
  6. Step 6: Final answer
    x = 81,554.04

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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.