Home / 200,128.40-300,046.80-81,738.80

Finding the Fourth Proportional to 200,128.40, 300,046.80 and 81,738.80

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Solution

The fourth proportional to 200,128.40, 300,046.80 and 81,738.80 is: 122,548.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,128.40 : 300,046.80 = 81,738.80 : x
  2. Step 2: Convert to fraction form
    200,128.40/300,046.80 = 81,738.80/x
  3. Step 3: Cross multiply
    200,128.40x = 300,046.80 × 81,738.80
  4. Step 4: Simplify right side
    200,128.40x = 24,525,465,375.84
  5. Step 5: Solve for x
    x = 24,525,465,375.84/200,128.40
  6. Step 6: Final answer
    x = 122,548.65

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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.