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Finding the Third Proportional to 111,072,139 and 239,212,989

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Solution

The third proportional to 111,072,139 and 239,212,989 is: 515,186,388.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,072,139 : 239,212,989 = 239,212,989 : x
  2. Step 2: Convert to fraction form
    111,072,139/239,212,989 = 239,212,989/x
  3. Step 3: Cross multiply
    111,072,139x = 239,212,989 × 239,212,989
  4. Step 4: Simplify right side
    111,072,139x = 57,222,854,106,314,120
  5. Step 5: Solve for x
    x = 57,222,854,106,314,120/111,072,139
  6. Step 6: Final answer
    x = 515,186,388.07

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.