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Finding the Fourth Proportional to 100,611.84, 150,974.40 and 92,680.32

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Solution

The fourth proportional to 100,611.84, 150,974.40 and 92,680.32 is: 139,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,611.84 : 150,974.40 = 92,680.32 : x
  2. Step 2: Convert to fraction form
    100,611.84/150,974.40 = 92,680.32/x
  3. Step 3: Cross multiply
    100,611.84x = 150,974.40 × 92,680.32
  4. Step 4: Simplify right side
    100,611.84x = 13,992,355,703.81
  5. Step 5: Solve for x
    x = 13,992,355,703.81/100,611.84
  6. Step 6: Final answer
    x = 139,072.65

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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.