Home / 212,961.78-319,405.20-77,997.96

Finding the Fourth Proportional to 212,961.78, 319,405.20 and 77,997.96

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Solution

The fourth proportional to 212,961.78, 319,405.20 and 77,997.96 is: 116,983.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,961.78 : 319,405.20 = 77,997.96 : x
  2. Step 2: Convert to fraction form
    212,961.78/319,405.20 = 77,997.96/x
  3. Step 3: Cross multiply
    212,961.78x = 319,405.20 × 77,997.96
  4. Step 4: Simplify right side
    212,961.78x = 24,912,952,026.38
  5. Step 5: Solve for x
    x = 24,912,952,026.38/212,961.78
  6. Step 6: Final answer
    x = 116,983.21

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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.