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Finding the Third Proportional to 66,977.75 and 91,212.38

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Solution

The third proportional to 66,977.75 and 91,212.38 is: 124,215.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,977.75 : 91,212.38 = 91,212.38 : x
  2. Step 2: Convert to fraction form
    66,977.75/91,212.38 = 91,212.38/x
  3. Step 3: Cross multiply
    66,977.75x = 91,212.38 × 91,212.38
  4. Step 4: Simplify right side
    66,977.75x = 8,319,697,353.14
  5. Step 5: Solve for x
    x = 8,319,697,353.14/66,977.75
  6. Step 6: Final answer
    x = 124,215.84

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.