Finding the Fourth Proportional to 85,879.35, 128,832.78 and 26,728.68
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Solution
The fourth proportional to 85,879.35, 128,832.78 and 26,728.68 is: 40,097.30
Step by Step Solution
- Step 1: Write the proportion equation
85,879.35 : 128,832.78 = 26,728.68 : x - Step 2: Convert to fraction form
85,879.35/128,832.78 = 26,728.68/x - Step 3: Cross multiply
85,879.35x = 128,832.78 × 26,728.68 - Step 4: Simplify right side
85,879.35x = 3,443,530,150.13 - Step 5: Solve for x
x = 3,443,530,150.13/85,879.35 - Step 6: Final answer
x = 40,097.30
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.