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Finding the Fourth Proportional to 84,120.96, 126,181.44 and 28,717.44

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Solution

The fourth proportional to 84,120.96, 126,181.44 and 28,717.44 is: 43,076.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,120.96 : 126,181.44 = 28,717.44 : x
  2. Step 2: Convert to fraction form
    84,120.96/126,181.44 = 28,717.44/x
  3. Step 3: Cross multiply
    84,120.96x = 126,181.44 × 28,717.44
  4. Step 4: Simplify right side
    84,120.96x = 3,623,607,932.31
  5. Step 5: Solve for x
    x = 3,623,607,932.31/84,120.96
  6. Step 6: Final answer
    x = 43,076.16

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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.