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Finding the Fourth Proportional to 45,906.48, 68,850.60 and 20,939.76

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Solution

The fourth proportional to 45,906.48, 68,850.60 and 20,939.76 is: 31,405.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,906.48 : 68,850.60 = 20,939.76 : x
  2. Step 2: Convert to fraction form
    45,906.48/68,850.60 = 20,939.76/x
  3. Step 3: Cross multiply
    45,906.48x = 68,850.60 × 20,939.76
  4. Step 4: Simplify right side
    45,906.48x = 1,441,715,039.86
  5. Step 5: Solve for x
    x = 1,441,715,039.86/45,906.48
  6. Step 6: Final answer
    x = 31,405.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.