Home / 149,114.10-205,777.91-81,131.09

Finding the Fourth Proportional to 149,114.10, 205,777.91 and 81,131.09

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Solution

The fourth proportional to 149,114.10, 205,777.91 and 81,131.09 is: 111,961.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,114.10 : 205,777.91 = 81,131.09 : x
  2. Step 2: Convert to fraction form
    149,114.10/205,777.91 = 81,131.09/x
  3. Step 3: Cross multiply
    149,114.10x = 205,777.91 × 81,131.09
  4. Step 4: Simplify right side
    149,114.10x = 16,694,986,475.96
  5. Step 5: Solve for x
    x = 16,694,986,475.96/149,114.10
  6. Step 6: Final answer
    x = 111,961.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.