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Finding the Fourth Proportional to 91,872.78, 126,791.79 and 51,589.22

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Solution

The fourth proportional to 91,872.78, 126,791.79 and 51,589.22 is: 71,197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,872.78 : 126,791.79 = 51,589.22 : x
  2. Step 2: Convert to fraction form
    91,872.78/126,791.79 = 51,589.22/x
  3. Step 3: Cross multiply
    91,872.78x = 126,791.79 × 51,589.22
  4. Step 4: Simplify right side
    91,872.78x = 6,541,089,548.50
  5. Step 5: Solve for x
    x = 6,541,089,548.50/91,872.78
  6. Step 6: Final answer
    x = 71,197.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.