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Finding the Fourth Proportional to 57,991.58, 86,878.26 and 45,473.60

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Solution

The fourth proportional to 57,991.58, 86,878.26 and 45,473.60 is: 68,124.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,991.58 : 86,878.26 = 45,473.60 : x
  2. Step 2: Convert to fraction form
    57,991.58/86,878.26 = 45,473.60/x
  3. Step 3: Cross multiply
    57,991.58x = 86,878.26 × 45,473.60
  4. Step 4: Simplify right side
    57,991.58x = 3,950,667,243.94
  5. Step 5: Solve for x
    x = 3,950,667,243.94/57,991.58
  6. Step 6: Final answer
    x = 68,124.84

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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.