Home / 208,186.73-312,144.77-81,839.34

Finding the Fourth Proportional to 208,186.73, 312,144.77 and 81,839.34

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Solution

The fourth proportional to 208,186.73, 312,144.77 and 81,839.34 is: 122,705.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,186.73 : 312,144.77 = 81,839.34 : x
  2. Step 2: Convert to fraction form
    208,186.73/312,144.77 = 81,839.34/x
  3. Step 3: Cross multiply
    208,186.73x = 312,144.77 × 81,839.34
  4. Step 4: Simplify right side
    208,186.73x = 25,545,722,165.85
  5. Step 5: Solve for x
    x = 25,545,722,165.85/208,186.73
  6. Step 6: Final answer
    x = 122,705.81

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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.