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Finding the Fourth Proportional to 108,995.76, 150,394.32 and 82,129.68

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Solution

The fourth proportional to 108,995.76, 150,394.32 and 82,129.68 is: 113,324.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,995.76 : 150,394.32 = 82,129.68 : x
  2. Step 2: Convert to fraction form
    108,995.76/150,394.32 = 82,129.68/x
  3. Step 3: Cross multiply
    108,995.76x = 150,394.32 × 82,129.68
  4. Step 4: Simplify right side
    108,995.76x = 12,351,837,375.42
  5. Step 5: Solve for x
    x = 12,351,837,375.42/108,995.76
  6. Step 6: Final answer
    x = 113,324.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.