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Finding the Fourth Proportional to 20,758,822.60, 31,138,233.90 and 20,758,822.60

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Solution

The fourth proportional to 20,758,822.60, 31,138,233.90 and 20,758,822.60 is: 31,138,233.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758,822.60 : 31,138,233.90 = 20,758,822.60 : x
  2. Step 2: Convert to fraction form
    20,758,822.60/31,138,233.90 = 20,758,822.60/x
  3. Step 3: Cross multiply
    20,758,822.60x = 31,138,233.90 × 20,758,822.60
  4. Step 4: Simplify right side
    20,758,822.60x = 646,393,073,607,406.12
  5. Step 5: Solve for x
    x = 646,393,073,607,406.12/20,758,822.60
  6. Step 6: Final answer
    x = 31,138,233.90

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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.