Finding the Fourth Proportional to 85,486.15, 117,986.97 and 49,678.12
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Solution
The fourth proportional to 85,486.15, 117,986.97 and 49,678.12 is: 68,565.15
Step by Step Solution
- Step 1: Write the proportion equation
85,486.15 : 117,986.97 = 49,678.12 : x - Step 2: Convert to fraction form
85,486.15/117,986.97 = 49,678.12/x - Step 3: Cross multiply
85,486.15x = 117,986.97 × 49,678.12 - Step 4: Simplify right side
85,486.15x = 5,861,370,854.10 - Step 5: Solve for x
x = 5,861,370,854.10/85,486.15 - Step 6: Final answer
x = 68,565.15
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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.