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Finding the Fourth Proportional to 186,861.30, 280,379.43 and 81,666.60

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Solution

The fourth proportional to 186,861.30, 280,379.43 and 81,666.60 is: 122,538.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,861.30 : 280,379.43 = 81,666.60 : x
  2. Step 2: Convert to fraction form
    186,861.30/280,379.43 = 81,666.60/x
  3. Step 3: Cross multiply
    186,861.30x = 280,379.43 × 81,666.60
  4. Step 4: Simplify right side
    186,861.30x = 22,897,634,758.04
  5. Step 5: Solve for x
    x = 22,897,634,758.04/186,861.30
  6. Step 6: Final answer
    x = 122,538.13

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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.