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Finding the Third Proportional to 18,867,949 and 40,426,729

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Solution

The third proportional to 18,867,949 and 40,426,729 is: 86,618,869.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867,949 : 40,426,729 = 40,426,729 : x
  2. Step 2: Convert to fraction form
    18,867,949/40,426,729 = 40,426,729/x
  3. Step 3: Cross multiply
    18,867,949x = 40,426,729 × 40,426,729
  4. Step 4: Simplify right side
    18,867,949x = 1,634,320,417,639,441
  5. Step 5: Solve for x
    x = 1,634,320,417,639,441/18,867,949
  6. Step 6: Final answer
    x = 86,618,869.79

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.