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Finding the Fourth Proportional to 186,838.60, 280,355.10 and 81,668.20

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Solution

The fourth proportional to 186,838.60, 280,355.10 and 81,668.20 is: 122,544.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,838.60 : 280,355.10 = 81,668.20 : x
  2. Step 2: Convert to fraction form
    186,838.60/280,355.10 = 81,668.20/x
  3. Step 3: Cross multiply
    186,838.60x = 280,355.10 × 81,668.20
  4. Step 4: Simplify right side
    186,838.60x = 22,896,096,377.82
  5. Step 5: Solve for x
    x = 22,896,096,377.82/186,838.60
  6. Step 6: Final answer
    x = 122,544.79

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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.