Finding the Fourth Proportional to 86,990.09, 120,104.16 and 66,810.92
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Solution
The fourth proportional to 86,990.09, 120,104.16 and 66,810.92 is: 92,243.49
Step by Step Solution
- Step 1: Write the proportion equation
86,990.09 : 120,104.16 = 66,810.92 : x - Step 2: Convert to fraction form
86,990.09/120,104.16 = 66,810.92/x - Step 3: Cross multiply
86,990.09x = 120,104.16 × 66,810.92 - Step 4: Simplify right side
86,990.09x = 8,024,268,824.91 - Step 5: Solve for x
x = 8,024,268,824.91/86,990.09 - Step 6: Final answer
x = 92,243.49
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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.