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Finding the Fourth Proportional to 208,820.40, 313,230.60 and 68,593.20

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Solution

The fourth proportional to 208,820.40, 313,230.60 and 68,593.20 is: 102,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,820.40 : 313,230.60 = 68,593.20 : x
  2. Step 2: Convert to fraction form
    208,820.40/313,230.60 = 68,593.20/x
  3. Step 3: Cross multiply
    208,820.40x = 313,230.60 × 68,593.20
  4. Step 4: Simplify right side
    208,820.40x = 21,485,489,191.92
  5. Step 5: Solve for x
    x = 21,485,489,191.92/208,820.40
  6. Step 6: Final answer
    x = 102,889.80

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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.