Home / 149,112.78-205,777.67-81,130.56

Finding the Fourth Proportional to 149,112.78, 205,777.67 and 81,130.56

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Solution

The fourth proportional to 149,112.78, 205,777.67 and 81,130.56 is: 111,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,112.78 : 205,777.67 = 81,130.56 : x
  2. Step 2: Convert to fraction form
    149,112.78/205,777.67 = 81,130.56/x
  3. Step 3: Cross multiply
    149,112.78x = 205,777.67 × 81,130.56
  4. Step 4: Simplify right side
    149,112.78x = 16,694,857,196.94
  5. Step 5: Solve for x
    x = 16,694,857,196.94/149,112.78
  6. Step 6: Final answer
    x = 111,961.28

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1.5x scale

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.