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Finding the Fourth Proportional to 85,647.25, 118,245.05 and 55,891.09

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Solution

The fourth proportional to 85,647.25, 118,245.05 and 55,891.09 is: 77,163.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,647.25 : 118,245.05 = 55,891.09 : x
  2. Step 2: Convert to fraction form
    85,647.25/118,245.05 = 55,891.09/x
  3. Step 3: Cross multiply
    85,647.25x = 118,245.05 × 55,891.09
  4. Step 4: Simplify right side
    85,647.25x = 6,608,844,731.60
  5. Step 5: Solve for x
    x = 6,608,844,731.60/85,647.25
  6. Step 6: Final answer
    x = 77,163.54

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1.5x scale

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.