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Finding the Fourth Proportional to 208,128.80, 311,755.80 and 173,136.80

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Solution

The fourth proportional to 208,128.80, 311,755.80 and 173,136.80 is: 259,341.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,128.80 : 311,755.80 = 173,136.80 : x
  2. Step 2: Convert to fraction form
    208,128.80/311,755.80 = 173,136.80/x
  3. Step 3: Cross multiply
    208,128.80x = 311,755.80 × 173,136.80
  4. Step 4: Simplify right side
    208,128.80x = 53,976,401,593.44
  5. Step 5: Solve for x
    x = 53,976,401,593.44/208,128.80
  6. Step 6: Final answer
    x = 259,341.34

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1.5x scale

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.