Home / 208,270.49-312,195.34-81,999.33

Finding the Fourth Proportional to 208,270.49, 312,195.34 and 81,999.33

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Solution

The fourth proportional to 208,270.49, 312,195.34 and 81,999.33 is: 122,916.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,270.49 : 312,195.34 = 81,999.33 : x
  2. Step 2: Convert to fraction form
    208,270.49/312,195.34 = 81,999.33/x
  3. Step 3: Cross multiply
    208,270.49x = 312,195.34 × 81,999.33
  4. Step 4: Simplify right side
    208,270.49x = 25,599,809,694.61
  5. Step 5: Solve for x
    x = 25,599,809,694.61/208,270.49
  6. Step 6: Final answer
    x = 122,916.17

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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.