Finding the Fourth Proportional to 85,449.09, 117,911.79 and 49,638.60
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Solution
The fourth proportional to 85,449.09, 117,911.79 and 49,638.60 is: 68,496.65
Step by Step Solution
- Step 1: Write the proportion equation
85,449.09 : 117,911.79 = 49,638.60 : x - Step 2: Convert to fraction form
85,449.09/117,911.79 = 49,638.60/x - Step 3: Cross multiply
85,449.09x = 117,911.79 × 49,638.60 - Step 4: Simplify right side
85,449.09x = 5,852,976,179.09 - Step 5: Solve for x
x = 5,852,976,179.09/85,449.09 - Step 6: Final answer
x = 68,496.65
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1.5x scale
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.