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Finding the Fourth Proportional to 74,106.90, 111,078.80 and 36,611.46

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Solution

The fourth proportional to 74,106.90, 111,078.80 and 36,611.46 is: 54,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,106.90 : 111,078.80 = 36,611.46 : x
  2. Step 2: Convert to fraction form
    74,106.90/111,078.80 = 36,611.46/x
  3. Step 3: Cross multiply
    74,106.90x = 111,078.80 × 36,611.46
  4. Step 4: Simplify right side
    74,106.90x = 4,066,756,859.99
  5. Step 5: Solve for x
    x = 4,066,756,859.99/74,106.90
  6. Step 6: Final answer
    x = 54,876.90

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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.