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Finding the Fourth Proportional to 78,696.36, 107,990.01 and 71,568.36

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Solution

The fourth proportional to 78,696.36, 107,990.01 and 71,568.36 is: 98,208.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,696.36 : 107,990.01 = 71,568.36 : x
  2. Step 2: Convert to fraction form
    78,696.36/107,990.01 = 71,568.36/x
  3. Step 3: Cross multiply
    78,696.36x = 107,990.01 × 71,568.36
  4. Step 4: Simplify right side
    78,696.36x = 7,728,667,912.08
  5. Step 5: Solve for x
    x = 7,728,667,912.08/78,696.36
  6. Step 6: Final answer
    x = 98,208.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.