Finding the Fourth Proportional to 86,814.67, 130,872.69 and 81,027.99
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Solution
The fourth proportional to 86,814.67, 130,872.69 and 81,027.99 is: 122,149.30
Step by Step Solution
- Step 1: Write the proportion equation
86,814.67 : 130,872.69 = 81,027.99 : x - Step 2: Convert to fraction form
86,814.67/130,872.69 = 81,027.99/x - Step 3: Cross multiply
86,814.67x = 130,872.69 × 81,027.99 - Step 4: Simplify right side
86,814.67x = 10,604,351,016.59 - Step 5: Solve for x
x = 10,604,351,016.59/86,814.67 - Step 6: Final answer
x = 122,149.30
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.