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Finding the Fourth Proportional to 128,906.43, 193,313.32 and 44,643.90

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Solution

The fourth proportional to 128,906.43, 193,313.32 and 44,643.90 is: 66,949.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,906.43 : 193,313.32 = 44,643.90 : x
  2. Step 2: Convert to fraction form
    128,906.43/193,313.32 = 44,643.90/x
  3. Step 3: Cross multiply
    128,906.43x = 193,313.32 × 44,643.90
  4. Step 4: Simplify right side
    128,906.43x = 8,630,260,526.75
  5. Step 5: Solve for x
    x = 8,630,260,526.75/128,906.43
  6. Step 6: Final answer
    x = 66,949.81

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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.