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Finding the Fourth Proportional to 72,836,999.80, 109,255,499.70 and 72,836,999.80

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Solution

The fourth proportional to 72,836,999.80, 109,255,499.70 and 72,836,999.80 is: 109,255,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,836,999.80 : 109,255,499.70 = 72,836,999.80 : x
  2. Step 2: Convert to fraction form
    72,836,999.80/109,255,499.70 = 72,836,999.80/x
  3. Step 3: Cross multiply
    72,836,999.80x = 109,255,499.70 × 72,836,999.80
  4. Step 4: Simplify right side
    72,836,999.80x = 7,957,842,809,797,800
  5. Step 5: Solve for x
    x = 7,957,842,809,797,800/72,836,999.80
  6. Step 6: Final answer
    x = 109,255,499.70

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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.