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Finding the Fourth Proportional to 186,786.80, 280,180.20 and 153,981.80

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Solution

The fourth proportional to 186,786.80, 280,180.20 and 153,981.80 is: 230,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,786.80 : 280,180.20 = 153,981.80 : x
  2. Step 2: Convert to fraction form
    186,786.80/280,180.20 = 153,981.80/x
  3. Step 3: Cross multiply
    186,786.80x = 280,180.20 × 153,981.80
  4. Step 4: Simplify right side
    186,786.80x = 43,142,651,520.36
  5. Step 5: Solve for x
    x = 43,142,651,520.36/186,786.80
  6. Step 6: Final answer
    x = 230,972.70

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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.