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Finding the Fourth Proportional to 186,640.60, 279,960.90 and 61,981.60

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Solution

The fourth proportional to 186,640.60, 279,960.90 and 61,981.60 is: 92,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,640.60 : 279,960.90 = 61,981.60 : x
  2. Step 2: Convert to fraction form
    186,640.60/279,960.90 = 61,981.60/x
  3. Step 3: Cross multiply
    186,640.60x = 279,960.90 × 61,981.60
  4. Step 4: Simplify right side
    186,640.60x = 17,352,424,519.44
  5. Step 5: Solve for x
    x = 17,352,424,519.44/186,640.60
  6. Step 6: Final answer
    x = 92,972.40

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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.