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Finding the Fourth Proportional to 248,978.31, 373,690.46 and 129,121.09

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Solution

The fourth proportional to 248,978.31, 373,690.46 and 129,121.09 is: 193,797.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,978.31 : 373,690.46 = 129,121.09 : x
  2. Step 2: Convert to fraction form
    248,978.31/373,690.46 = 129,121.09/x
  3. Step 3: Cross multiply
    248,978.31x = 373,690.46 × 129,121.09
  4. Step 4: Simplify right side
    248,978.31x = 48,251,318,906.38
  5. Step 5: Solve for x
    x = 48,251,318,906.38/248,978.31
  6. Step 6: Final answer
    x = 193,797.28

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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.