Home / 149,098.56-205,756.49-81,115.51

Finding the Fourth Proportional to 149,098.56, 205,756.49 and 81,115.51

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Solution

The fourth proportional to 149,098.56, 205,756.49 and 81,115.51 is: 111,939.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,098.56 : 205,756.49 = 81,115.51 : x
  2. Step 2: Convert to fraction form
    149,098.56/205,756.49 = 81,115.51/x
  3. Step 3: Cross multiply
    149,098.56x = 205,756.49 × 81,115.51
  4. Step 4: Simplify right side
    149,098.56x = 16,690,042,622.16
  5. Step 5: Solve for x
    x = 16,690,042,622.16/149,098.56
  6. Step 6: Final answer
    x = 111,939.66

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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.