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Finding the Fourth Proportional to 80,857.62, 121,324.10 and 30,921.27

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Solution

The fourth proportional to 80,857.62, 121,324.10 and 30,921.27 is: 46,396.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,857.62 : 121,324.10 = 30,921.27 : x
  2. Step 2: Convert to fraction form
    80,857.62/121,324.10 = 30,921.27/x
  3. Step 3: Cross multiply
    80,857.62x = 121,324.10 × 30,921.27
  4. Step 4: Simplify right side
    80,857.62x = 3,751,495,099.00
  5. Step 5: Solve for x
    x = 3,751,495,099.00/80,857.62
  6. Step 6: Final answer
    x = 46,396.31

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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.