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Finding the Fourth Proportional to 445,847.29, 668,811.62 and 126,003.78

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Solution

The fourth proportional to 445,847.29, 668,811.62 and 126,003.78 is: 189,017.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,847.29 : 668,811.62 = 126,003.78 : x
  2. Step 2: Convert to fraction form
    445,847.29/668,811.62 = 126,003.78/x
  3. Step 3: Cross multiply
    445,847.29x = 668,811.62 × 126,003.78
  4. Step 4: Simplify right side
    445,847.29x = 84,272,792,227.92
  5. Step 5: Solve for x
    x = 84,272,792,227.92/445,847.29
  6. Step 6: Final answer
    x = 189,017.17

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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.