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Finding the Fourth Proportional to 445,928.68, 668,808.88 and 126,078

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Solution

The fourth proportional to 445,928.68, 668,808.88 and 126,078 is: 189,093.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,928.68 : 668,808.88 = 126,078 : x
  2. Step 2: Convert to fraction form
    445,928.68/668,808.88 = 126,078/x
  3. Step 3: Cross multiply
    445,928.68x = 668,808.88 × 126,078
  4. Step 4: Simplify right side
    445,928.68x = 84,322,085,972.64
  5. Step 5: Solve for x
    x = 84,322,085,972.64/445,928.68
  6. Step 6: Final answer
    x = 189,093.21

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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.