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Finding the Fourth Proportional to 186,999.40, 280,412.70 and 81,764.20

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Solution

The fourth proportional to 186,999.40, 280,412.70 and 81,764.20 is: 122,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,999.40 : 280,412.70 = 81,764.20 : x
  2. Step 2: Convert to fraction form
    186,999.40/280,412.70 = 81,764.20/x
  3. Step 3: Cross multiply
    186,999.40x = 280,412.70 × 81,764.20
  4. Step 4: Simplify right side
    186,999.40x = 22,927,720,085.34
  5. Step 5: Solve for x
    x = 22,927,720,085.34/186,999.40
  6. Step 6: Final answer
    x = 122,608.52

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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.