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Finding the Fourth Proportional to 11,978,083.20, 17,967,124.80 and 4,786,060.80

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Solution

The fourth proportional to 11,978,083.20, 17,967,124.80 and 4,786,060.80 is: 7,179,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978,083.20 : 17,967,124.80 = 4,786,060.80 : x
  2. Step 2: Convert to fraction form
    11,978,083.20/17,967,124.80 = 4,786,060.80/x
  3. Step 3: Cross multiply
    11,978,083.20x = 17,967,124.80 × 4,786,060.80
  4. Step 4: Simplify right side
    11,978,083.20x = 85,991,751,693,987.84
  5. Step 5: Solve for x
    x = 85,991,751,693,987.84/11,978,083.20
  6. Step 6: Final answer
    x = 7,179,091.20

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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.