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Finding the Third Proportional to 90,251,872 and 139,517,888

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Solution

The third proportional to 90,251,872 and 139,517,888 is: 215,676,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,251,872 : 139,517,888 = 139,517,888 : x
  2. Step 2: Convert to fraction form
    90,251,872/139,517,888 = 139,517,888/x
  3. Step 3: Cross multiply
    90,251,872x = 139,517,888 × 139,517,888
  4. Step 4: Simplify right side
    90,251,872x = 19,465,241,071,980,544
  5. Step 5: Solve for x
    x = 19,465,241,071,980,544/90,251,872
  6. Step 6: Final answer
    x = 215,676,867.87

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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.