Finding the Fourth Proportional to 212,638.99, 319,091.99 and 86,279.74
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Solution
The fourth proportional to 212,638.99, 319,091.99 and 86,279.74 is: 129,473.78
Step by Step Solution
- Step 1: Write the proportion equation
212,638.99 : 319,091.99 = 86,279.74 : x - Step 2: Convert to fraction form
212,638.99/319,091.99 = 86,279.74/x - Step 3: Cross multiply
212,638.99x = 319,091.99 × 86,279.74 - Step 4: Simplify right side
212,638.99x = 27,531,173,933.28 - Step 5: Solve for x
x = 27,531,173,933.28/212,638.99 - Step 6: Final answer
x = 129,473.78
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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.