Home / 108,418.36-162,720.96-75,161.78

Finding the Fourth Proportional to 108,418.36, 162,720.96 and 75,161.78

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Solution

The fourth proportional to 108,418.36, 162,720.96 and 75,161.78 is: 112,807.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,418.36 : 162,720.96 = 75,161.78 : x
  2. Step 2: Convert to fraction form
    108,418.36/162,720.96 = 75,161.78/x
  3. Step 3: Cross multiply
    108,418.36x = 162,720.96 × 75,161.78
  4. Step 4: Simplify right side
    108,418.36x = 12,230,396,621.10
  5. Step 5: Solve for x
    x = 12,230,396,621.10/108,418.36
  6. Step 6: Final answer
    x = 112,807.43

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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.