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Finding the Fourth Proportional to 120,571.02, 166,390 and 66,858.30

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Solution

The fourth proportional to 120,571.02, 166,390 and 66,858.30 is: 92,265.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,571.02 : 166,390 = 66,858.30 : x
  2. Step 2: Convert to fraction form
    120,571.02/166,390 = 66,858.30/x
  3. Step 3: Cross multiply
    120,571.02x = 166,390 × 66,858.30
  4. Step 4: Simplify right side
    120,571.02x = 11,124,552,537
  5. Step 5: Solve for x
    x = 11,124,552,537/120,571.02
  6. Step 6: Final answer
    x = 92,265.56

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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.