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Finding the Third Proportional to 135,138 and 211,989

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Solution

The third proportional to 135,138 and 211,989 is: 332,544.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,138 : 211,989 = 211,989 : x
  2. Step 2: Convert to fraction form
    135,138/211,989 = 211,989/x
  3. Step 3: Cross multiply
    135,138x = 211,989 × 211,989
  4. Step 4: Simplify right side
    135,138x = 44,939,336,121
  5. Step 5: Solve for x
    x = 44,939,336,121/135,138
  6. Step 6: Final answer
    x = 332,544.04

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.