Home / 199,415.11-299,179.18-81,171.31

Finding the Fourth Proportional to 199,415.11, 299,179.18 and 81,171.31

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Solution

The fourth proportional to 199,415.11, 299,179.18 and 81,171.31 is: 121,779.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,415.11 : 299,179.18 = 81,171.31 : x
  2. Step 2: Convert to fraction form
    199,415.11/299,179.18 = 81,171.31/x
  3. Step 3: Cross multiply
    199,415.11x = 299,179.18 × 81,171.31
  4. Step 4: Simplify right side
    199,415.11x = 24,284,764,469.43
  5. Step 5: Solve for x
    x = 24,284,764,469.43/199,415.11
  6. Step 6: Final answer
    x = 121,779.96

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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.