Finding the Fourth Proportional to 91,520.19, 126,232.74 and 83,990.84
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Solution
The fourth proportional to 91,520.19, 126,232.74 and 83,990.84 is: 115,847.59
Step by Step Solution
- Step 1: Write the proportion equation
91,520.19 : 126,232.74 = 83,990.84 : x - Step 2: Convert to fraction form
91,520.19/126,232.74 = 83,990.84/x - Step 3: Cross multiply
91,520.19x = 126,232.74 × 83,990.84 - Step 4: Simplify right side
91,520.19x = 10,602,393,236.94 - Step 5: Solve for x
x = 10,602,393,236.94/91,520.19 - Step 6: Final answer
x = 115,847.59
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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.