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Finding the Fourth Proportional to 61,170.75, 91,780.62 and 27,906.48

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Solution

The fourth proportional to 61,170.75, 91,780.62 and 27,906.48 is: 41,870.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,170.75 : 91,780.62 = 27,906.48 : x
  2. Step 2: Convert to fraction form
    61,170.75/91,780.62 = 27,906.48/x
  3. Step 3: Cross multiply
    61,170.75x = 91,780.62 × 27,906.48
  4. Step 4: Simplify right side
    61,170.75x = 2,561,274,036.42
  5. Step 5: Solve for x
    x = 2,561,274,036.42/61,170.75
  6. Step 6: Final answer
    x = 41,870.89

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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.