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Finding the Fourth Proportional to 108,673.20, 162,912.60 and 71,251.20

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Solution

The fourth proportional to 108,673.20, 162,912.60 and 71,251.20 is: 106,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,673.20 : 162,912.60 = 71,251.20 : x
  2. Step 2: Convert to fraction form
    108,673.20/162,912.60 = 71,251.20/x
  3. Step 3: Cross multiply
    108,673.20x = 162,912.60 × 71,251.20
  4. Step 4: Simplify right side
    108,673.20x = 11,607,718,245.12
  5. Step 5: Solve for x
    x = 11,607,718,245.12/108,673.20
  6. Step 6: Final answer
    x = 106,813.07

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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.