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Finding the Fourth Proportional to 186,640.20, 279,960.30 and 61,981.20

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Solution

The fourth proportional to 186,640.20, 279,960.30 and 61,981.20 is: 92,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,640.20 : 279,960.30 = 61,981.20 : x
  2. Step 2: Convert to fraction form
    186,640.20/279,960.30 = 61,981.20/x
  3. Step 3: Cross multiply
    186,640.20x = 279,960.30 × 61,981.20
  4. Step 4: Simplify right side
    186,640.20x = 17,352,275,346.36
  5. Step 5: Solve for x
    x = 17,352,275,346.36/186,640.20
  6. Step 6: Final answer
    x = 92,971.80

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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.