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Finding the Fourth Proportional to 66,783.78, 91,975.77 and 51,620.58

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Solution

The fourth proportional to 66,783.78, 91,975.77 and 51,620.58 is: 71,092.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,783.78 : 91,975.77 = 51,620.58 : x
  2. Step 2: Convert to fraction form
    66,783.78/91,975.77 = 51,620.58/x
  3. Step 3: Cross multiply
    66,783.78x = 91,975.77 × 51,620.58
  4. Step 4: Simplify right side
    66,783.78x = 4,747,842,593.35
  5. Step 5: Solve for x
    x = 4,747,842,593.35/66,783.78
  6. Step 6: Final answer
    x = 71,092.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.