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Finding the Fourth Proportional to 76,255.79, 105,236.87 and 43,978.41

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Solution

The fourth proportional to 76,255.79, 105,236.87 and 43,978.41 is: 60,692.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,255.79 : 105,236.87 = 43,978.41 : x
  2. Step 2: Convert to fraction form
    76,255.79/105,236.87 = 43,978.41/x
  3. Step 3: Cross multiply
    76,255.79x = 105,236.87 × 43,978.41
  4. Step 4: Simplify right side
    76,255.79x = 4,628,149,469.90
  5. Step 5: Solve for x
    x = 4,628,149,469.90/76,255.79
  6. Step 6: Final answer
    x = 60,692.43

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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.