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Finding the Third Proportional to 90,251,874 and 139,517,891

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Solution

The third proportional to 90,251,874 and 139,517,891 is: 215,676,872.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,251,874 : 139,517,891 = 139,517,891 : x
  2. Step 2: Convert to fraction form
    90,251,874/139,517,891 = 139,517,891/x
  3. Step 3: Cross multiply
    90,251,874x = 139,517,891 × 139,517,891
  4. Step 4: Simplify right side
    90,251,874x = 19,465,241,909,087,880
  5. Step 5: Solve for x
    x = 19,465,241,909,087,880/90,251,874
  6. Step 6: Final answer
    x = 215,676,872.36

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.