Home / 200,128.28-300,192.92-81,799.60

Finding the Fourth Proportional to 200,128.28, 300,192.92 and 81,799.60

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Solution

The fourth proportional to 200,128.28, 300,192.92 and 81,799.60 is: 122,699.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,128.28 : 300,192.92 = 81,799.60 : x
  2. Step 2: Convert to fraction form
    200,128.28/300,192.92 = 81,799.60/x
  3. Step 3: Cross multiply
    200,128.28x = 300,192.92 × 81,799.60
  4. Step 4: Simplify right side
    200,128.28x = 24,555,660,778.83
  5. Step 5: Solve for x
    x = 24,555,660,778.83/200,128.28
  6. Step 6: Final answer
    x = 122,699.60

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1.5x scale

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.