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Finding the Fourth Proportional to 83,236,138.60, 116,721,912.80 and 83,236,138.60

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Solution

The fourth proportional to 83,236,138.60, 116,721,912.80 and 83,236,138.60 is: 116,721,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,236,138.60 : 116,721,912.80 = 83,236,138.60 : x
  2. Step 2: Convert to fraction form
    83,236,138.60/116,721,912.80 = 83,236,138.60/x
  3. Step 3: Cross multiply
    83,236,138.60x = 116,721,912.80 × 83,236,138.60
  4. Step 4: Simplify right side
    83,236,138.60x = 9,715,481,311,477,914
  5. Step 5: Solve for x
    x = 9,715,481,311,477,914/83,236,138.60
  6. Step 6: Final answer
    x = 116,721,912.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.