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Finding the Fourth Proportional to 186,861.70, 279,636.45 and 127,812.70

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Solution

The fourth proportional to 186,861.70, 279,636.45 and 127,812.70 is: 191,270.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,861.70 : 279,636.45 = 127,812.70 : x
  2. Step 2: Convert to fraction form
    186,861.70/279,636.45 = 127,812.70/x
  3. Step 3: Cross multiply
    186,861.70x = 279,636.45 × 127,812.70
  4. Step 4: Simplify right side
    186,861.70x = 35,741,089,692.92
  5. Step 5: Solve for x
    x = 35,741,089,692.92/186,861.70
  6. Step 6: Final answer
    x = 191,270.28

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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.