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Finding the Fourth Proportional to 91,745.67, 126,858.78 and 79,935.87

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Solution

The fourth proportional to 91,745.67, 126,858.78 and 79,935.87 is: 110,529.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,745.67 : 126,858.78 = 79,935.87 : x
  2. Step 2: Convert to fraction form
    91,745.67/126,858.78 = 79,935.87/x
  3. Step 3: Cross multiply
    91,745.67x = 126,858.78 × 79,935.87
  4. Step 4: Simplify right side
    91,745.67x = 10,140,566,946.44
  5. Step 5: Solve for x
    x = 10,140,566,946.44/91,745.67
  6. Step 6: Final answer
    x = 110,529.11

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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.