Home / 186,987.20-280,382.37-127,839.78

Finding the Fourth Proportional to 186,987.20, 280,382.37 and 127,839.78

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Solution

The fourth proportional to 186,987.20, 280,382.37 and 127,839.78 is: 191,692.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,987.20 : 280,382.37 = 127,839.78 : x
  2. Step 2: Convert to fraction form
    186,987.20/280,382.37 = 127,839.78/x
  3. Step 3: Cross multiply
    186,987.20x = 280,382.37 × 127,839.78
  4. Step 4: Simplify right side
    186,987.20x = 35,844,020,496.68
  5. Step 5: Solve for x
    x = 35,844,020,496.68/186,987.20
  6. Step 6: Final answer
    x = 191,692.38

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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.