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Finding the Fourth Proportional to 108,379.20, 162,568.80 and 92,632.80

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Solution

The fourth proportional to 108,379.20, 162,568.80 and 92,632.80 is: 138,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,379.20 : 162,568.80 = 92,632.80 : x
  2. Step 2: Convert to fraction form
    108,379.20/162,568.80 = 92,632.80/x
  3. Step 3: Cross multiply
    108,379.20x = 162,568.80 × 92,632.80
  4. Step 4: Simplify right side
    108,379.20x = 15,059,203,136.64
  5. Step 5: Solve for x
    x = 15,059,203,136.64/108,379.20
  6. Step 6: Final answer
    x = 138,949.20

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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.