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Finding the Third Proportional to 30,978 and 66,924

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Solution

The third proportional to 30,978 and 66,924 is: 144,580.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,978 : 66,924 = 66,924 : x
  2. Step 2: Convert to fraction form
    30,978/66,924 = 66,924/x
  3. Step 3: Cross multiply
    30,978x = 66,924 × 66,924
  4. Step 4: Simplify right side
    30,978x = 4,478,821,776
  5. Step 5: Solve for x
    x = 4,478,821,776/30,978
  6. Step 6: Final answer
    x = 144,580.73

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These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.