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Finding the Fourth Proportional to 445,921.86, 668,906.12 and 126,097.12

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Solution

The fourth proportional to 445,921.86, 668,906.12 and 126,097.12 is: 189,152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,921.86 : 668,906.12 = 126,097.12 : x
  2. Step 2: Convert to fraction form
    445,921.86/668,906.12 = 126,097.12/x
  3. Step 3: Cross multiply
    445,921.86x = 668,906.12 × 126,097.12
  4. Step 4: Simplify right side
    445,921.86x = 84,347,135,282.37
  5. Step 5: Solve for x
    x = 84,347,135,282.37/445,921.86
  6. Step 6: Final answer
    x = 189,152.28

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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.