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Finding the Fourth Proportional to 123,692,610.80, 185,538,916.20 and 120,858,258.80

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Solution

The fourth proportional to 123,692,610.80, 185,538,916.20 and 120,858,258.80 is: 181,287,388.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,692,610.80 : 185,538,916.20 = 120,858,258.80 : x
  2. Step 2: Convert to fraction form
    123,692,610.80/185,538,916.20 = 120,858,258.80/x
  3. Step 3: Cross multiply
    123,692,610.80x = 185,538,916.20 × 120,858,258.80
  4. Step 4: Simplify right side
    123,692,610.80x = 22,423,910,351,571,112
  5. Step 5: Solve for x
    x = 22,423,910,351,571,112/123,692,610.80
  6. Step 6: Final answer
    x = 181,287,388.20

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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.