Finding the Fourth Proportional to 86,750.26, 129,765.56 and 81,435.85
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Solution
The fourth proportional to 86,750.26, 129,765.56 and 81,435.85 is: 121,815.99
Step by Step Solution
- Step 1: Write the proportion equation
86,750.26 : 129,765.56 = 81,435.85 : x - Step 2: Convert to fraction form
86,750.26/129,765.56 = 81,435.85/x - Step 3: Cross multiply
86,750.26x = 129,765.56 × 81,435.85 - Step 4: Simplify right side
86,750.26x = 10,567,568,593.64 - Step 5: Solve for x
x = 10,567,568,593.64/86,750.26 - Step 6: Final answer
x = 121,815.99
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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.