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Finding the Fourth Proportional to 57,355.90, 79,163.78 and 31,871.02

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Solution

The fourth proportional to 57,355.90, 79,163.78 and 31,871.02 is: 43,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,355.90 : 79,163.78 = 31,871.02 : x
  2. Step 2: Convert to fraction form
    57,355.90/79,163.78 = 31,871.02/x
  3. Step 3: Cross multiply
    57,355.90x = 79,163.78 × 31,871.02
  4. Step 4: Simplify right side
    57,355.90x = 2,523,030,415.66
  5. Step 5: Solve for x
    x = 2,523,030,415.66/57,355.90
  6. Step 6: Final answer
    x = 43,989.03

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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.