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Finding the Fourth Proportional to 208,954.20, 313,636.10 and 103,891.80

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Solution

The fourth proportional to 208,954.20, 313,636.10 and 103,891.80 is: 155,939.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,954.20 : 313,636.10 = 103,891.80 : x
  2. Step 2: Convert to fraction form
    208,954.20/313,636.10 = 103,891.80/x
  3. Step 3: Cross multiply
    208,954.20x = 313,636.10 × 103,891.80
  4. Step 4: Simplify right side
    208,954.20x = 32,584,218,973.98
  5. Step 5: Solve for x
    x = 32,584,218,973.98/208,954.20
  6. Step 6: Final answer
    x = 155,939.53

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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.