Home / 149,009.28-205,633.87-81,025.76

Finding the Fourth Proportional to 149,009.28, 205,633.87 and 81,025.76

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Solution

The fourth proportional to 149,009.28, 205,633.87 and 81,025.76 is: 111,816.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,009.28 : 205,633.87 = 81,025.76 : x
  2. Step 2: Convert to fraction form
    149,009.28/205,633.87 = 81,025.76/x
  3. Step 3: Cross multiply
    149,009.28x = 205,633.87 × 81,025.76
  4. Step 4: Simplify right side
    149,009.28x = 16,661,640,598.49
  5. Step 5: Solve for x
    x = 16,661,640,598.49/149,009.28
  6. Step 6: Final answer
    x = 111,816.13

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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.