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Finding the Fourth Proportional to 210,997.78, 316,524.48 and 68,793.13

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Solution

The fourth proportional to 210,997.78, 316,524.48 and 68,793.13 is: 103,198.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,997.78 : 316,524.48 = 68,793.13 : x
  2. Step 2: Convert to fraction form
    210,997.78/316,524.48 = 68,793.13/x
  3. Step 3: Cross multiply
    210,997.78x = 316,524.48 × 68,793.13
  4. Step 4: Simplify right side
    210,997.78x = 21,774,709,838.50
  5. Step 5: Solve for x
    x = 21,774,709,838.50/210,997.78
  6. Step 6: Final answer
    x = 103,198.76

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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.