Finding the Fourth Proportional to 212,618.48, 318,939.36 and 86,239.96
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Solution
The fourth proportional to 212,618.48, 318,939.36 and 86,239.96 is: 129,364.66
Step by Step Solution
- Step 1: Write the proportion equation
212,618.48 : 318,939.36 = 86,239.96 : x - Step 2: Convert to fraction form
212,618.48/318,939.36 = 86,239.96/x - Step 3: Cross multiply
212,618.48x = 318,939.36 × 86,239.96 - Step 4: Simplify right side
212,618.48x = 27,505,317,648.83 - Step 5: Solve for x
x = 27,505,317,648.83/212,618.48 - Step 6: Final answer
x = 129,364.66
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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.