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Finding the Fourth Proportional to 57,987.58, 86,872.26 and 45,469.60

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Solution

The fourth proportional to 57,987.58, 86,872.26 and 45,469.60 is: 68,118.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,987.58 : 86,872.26 = 45,469.60 : x
  2. Step 2: Convert to fraction form
    57,987.58/86,872.26 = 45,469.60/x
  3. Step 3: Cross multiply
    57,987.58x = 86,872.26 × 45,469.60
  4. Step 4: Simplify right side
    57,987.58x = 3,950,046,913.30
  5. Step 5: Solve for x
    x = 3,950,046,913.30/57,987.58
  6. Step 6: Final answer
    x = 68,118.84

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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.