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Finding the Fourth Proportional to 186,986.40, 280,393.20 and 81,751.20

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Solution

The fourth proportional to 186,986.40, 280,393.20 and 81,751.20 is: 122,589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,986.40 : 280,393.20 = 81,751.20 : x
  2. Step 2: Convert to fraction form
    186,986.40/280,393.20 = 81,751.20/x
  3. Step 3: Cross multiply
    186,986.40x = 280,393.20 × 81,751.20
  4. Step 4: Simplify right side
    186,986.40x = 22,922,480,571.84
  5. Step 5: Solve for x
    x = 22,922,480,571.84/186,986.40
  6. Step 6: Final answer
    x = 122,589.03

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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.