Finding the Fourth Proportional to 87,982.94, 121,282.09 and 53,928.31
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Solution
The fourth proportional to 87,982.94, 121,282.09 and 53,928.31 is: 74,338.71
Step by Step Solution
- Step 1: Write the proportion equation
87,982.94 : 121,282.09 = 53,928.31 : x - Step 2: Convert to fraction form
87,982.94/121,282.09 = 53,928.31/x - Step 3: Cross multiply
87,982.94x = 121,282.09 × 53,928.31 - Step 4: Simplify right side
87,982.94x = 6,540,538,146.97 - Step 5: Solve for x
x = 6,540,538,146.97/87,982.94 - Step 6: Final answer
x = 74,338.71
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.