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Finding the Fourth Proportional to 108,651.05, 162,943.41 and 75,132.54

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Solution

The fourth proportional to 108,651.05, 162,943.41 and 75,132.54 is: 112,675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,651.05 : 162,943.41 = 75,132.54 : x
  2. Step 2: Convert to fraction form
    108,651.05/162,943.41 = 75,132.54/x
  3. Step 3: Cross multiply
    108,651.05x = 162,943.41 × 75,132.54
  4. Step 4: Simplify right side
    108,651.05x = 12,242,352,551.31
  5. Step 5: Solve for x
    x = 12,242,352,551.31/108,651.05
  6. Step 6: Final answer
    x = 112,675.88

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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.