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Finding the Third Proportional to 90,405,590 and 196,222,989

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Solution

The third proportional to 90,405,590 and 196,222,989 is: 425,896,909.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,405,590 : 196,222,989 = 196,222,989 : x
  2. Step 2: Convert to fraction form
    90,405,590/196,222,989 = 196,222,989/x
  3. Step 3: Cross multiply
    90,405,590x = 196,222,989 × 196,222,989
  4. Step 4: Simplify right side
    90,405,590x = 38,503,461,412,094,120
  5. Step 5: Solve for x
    x = 38,503,461,412,094,120/90,405,590
  6. Step 6: Final answer
    x = 425,896,909.83

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.