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Finding the Fourth Proportional to 27,147,592.89, 40,721,396.90 and 7,978,348.89

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Solution

The fourth proportional to 27,147,592.89, 40,721,396.90 and 7,978,348.89 is: 11,967,525.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,147,592.89 : 40,721,396.90 = 7,978,348.89 : x
  2. Step 2: Convert to fraction form
    27,147,592.89/40,721,396.90 = 7,978,348.89/x
  3. Step 3: Cross multiply
    27,147,592.89x = 40,721,396.90 × 7,978,348.89
  4. Step 4: Simplify right side
    27,147,592.89x = 324,889,511,716,472.69
  5. Step 5: Solve for x
    x = 324,889,511,716,472.69/27,147,592.89
  6. Step 6: Final answer
    x = 11,967,525.56

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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.