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Finding the Fourth Proportional to 186,981.60, 280,569.60 and 81,811.20

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Solution

The fourth proportional to 186,981.60, 280,569.60 and 81,811.20 is: 122,759.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,981.60 : 280,569.60 = 81,811.20 : x
  2. Step 2: Convert to fraction form
    186,981.60/280,569.60 = 81,811.20/x
  3. Step 3: Cross multiply
    186,981.60x = 280,569.60 × 81,811.20
  4. Step 4: Simplify right side
    186,981.60x = 22,953,735,659.52
  5. Step 5: Solve for x
    x = 22,953,735,659.52/186,981.60
  6. Step 6: Final answer
    x = 122,759.33

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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.