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Finding the Third Proportional to 66,780 and 99,958

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Solution

The third proportional to 66,780 and 99,958 is: 149,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,780 : 99,958 = 99,958 : x
  2. Step 2: Convert to fraction form
    66,780/99,958 = 99,958/x
  3. Step 3: Cross multiply
    66,780x = 99,958 × 99,958
  4. Step 4: Simplify right side
    66,780x = 9,991,601,764
  5. Step 5: Solve for x
    x = 9,991,601,764/66,780
  6. Step 6: Final answer
    x = 149,619.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.