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Finding the Third Proportional to 66,751,908 and 138,619,686

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Solution

The third proportional to 66,751,908 and 138,619,686 is: 287,863,192.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,751,908 : 138,619,686 = 138,619,686 : x
  2. Step 2: Convert to fraction form
    66,751,908/138,619,686 = 138,619,686/x
  3. Step 3: Cross multiply
    66,751,908x = 138,619,686 × 138,619,686
  4. Step 4: Simplify right side
    66,751,908x = 19,215,417,346,738,596
  5. Step 5: Solve for x
    x = 19,215,417,346,738,596/66,751,908
  6. Step 6: Final answer
    x = 287,863,192.57

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.