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Finding the Third Proportional to 30,170 and 66,178

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Solution

The third proportional to 30,170 and 66,178 is: 145,161.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,170 : 66,178 = 66,178 : x
  2. Step 2: Convert to fraction form
    30,170/66,178 = 66,178/x
  3. Step 3: Cross multiply
    30,170x = 66,178 × 66,178
  4. Step 4: Simplify right side
    30,170x = 4,379,527,684
  5. Step 5: Solve for x
    x = 4,379,527,684/30,170
  6. Step 6: Final answer
    x = 145,161.67

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.