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Finding the Fourth Proportional to 120,999.60, 181,936.80 and 118,375.20

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Solution

The fourth proportional to 120,999.60, 181,936.80 and 118,375.20 is: 177,990.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,999.60 : 181,936.80 = 118,375.20 : x
  2. Step 2: Convert to fraction form
    120,999.60/181,936.80 = 118,375.20/x
  3. Step 3: Cross multiply
    120,999.60x = 181,936.80 × 118,375.20
  4. Step 4: Simplify right side
    120,999.60x = 21,536,805,087.36
  5. Step 5: Solve for x
    x = 21,536,805,087.36/120,999.60
  6. Step 6: Final answer
    x = 177,990.71

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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.