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Finding the Fourth Proportional to 120,989.37, 166,964.29 and 67,273.91

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Solution

The fourth proportional to 120,989.37, 166,964.29 and 67,273.91 is: 92,837.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,989.37 : 166,964.29 = 67,273.91 : x
  2. Step 2: Convert to fraction form
    120,989.37/166,964.29 = 67,273.91/x
  3. Step 3: Cross multiply
    120,989.37x = 166,964.29 × 67,273.91
  4. Step 4: Simplify right side
    120,989.37x = 11,232,340,618.67
  5. Step 5: Solve for x
    x = 11,232,340,618.67/120,989.37
  6. Step 6: Final answer
    x = 92,837.42

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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.