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Finding the Fourth Proportional to 123,081.20, 184,708.20 and 53,010.80

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Solution

The fourth proportional to 123,081.20, 184,708.20 and 53,010.80 is: 79,553.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,081.20 : 184,708.20 = 53,010.80 : x
  2. Step 2: Convert to fraction form
    123,081.20/184,708.20 = 53,010.80/x
  3. Step 3: Cross multiply
    123,081.20x = 184,708.20 × 53,010.80
  4. Step 4: Simplify right side
    123,081.20x = 9,791,529,448.56
  5. Step 5: Solve for x
    x = 9,791,529,448.56/123,081.20
  6. Step 6: Final answer
    x = 79,553.41

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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.