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Finding the Fourth Proportional to 139,603,921.20, 209,405,881.80 and 92,790,612.11

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Solution

The fourth proportional to 139,603,921.20, 209,405,881.80 and 92,790,612.11 is: 139,185,918.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,603,921.20 : 209,405,881.80 = 92,790,612.11 : x
  2. Step 2: Convert to fraction form
    139,603,921.20/209,405,881.80 = 92,790,612.11/x
  3. Step 3: Cross multiply
    139,603,921.20x = 209,405,881.80 × 92,790,612.11
  4. Step 4: Simplify right side
    139,603,921.20x = 19,430,899,952,179,824
  5. Step 5: Solve for x
    x = 19,430,899,952,179,824/139,603,921.20
  6. Step 6: Final answer
    x = 139,185,918.17

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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.