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Finding the Fourth Proportional to 108,351.92, 149,563.32 and 74,472.80

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Solution

The fourth proportional to 108,351.92, 149,563.32 and 74,472.80 is: 102,798.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,351.92 : 149,563.32 = 74,472.80 : x
  2. Step 2: Convert to fraction form
    108,351.92/149,563.32 = 74,472.80/x
  3. Step 3: Cross multiply
    108,351.92x = 149,563.32 × 74,472.80
  4. Step 4: Simplify right side
    108,351.92x = 11,138,399,217.70
  5. Step 5: Solve for x
    x = 11,138,399,217.70/108,351.92
  6. Step 6: Final answer
    x = 102,798.36

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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.