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Finding the Fourth Proportional to 78,391.75, 108,181.78 and 44,399.39

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Solution

The fourth proportional to 78,391.75, 108,181.78 and 44,399.39 is: 61,271.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,391.75 : 108,181.78 = 44,399.39 : x
  2. Step 2: Convert to fraction form
    78,391.75/108,181.78 = 44,399.39/x
  3. Step 3: Cross multiply
    78,391.75x = 108,181.78 × 44,399.39
  4. Step 4: Simplify right side
    78,391.75x = 4,803,204,997.73
  5. Step 5: Solve for x
    x = 4,803,204,997.73/78,391.75
  6. Step 6: Final answer
    x = 61,271.82

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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.