Finding the Fourth Proportional to 212,721.80, 319,082.70 and 107,745.80
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Solution
The fourth proportional to 212,721.80, 319,082.70 and 107,745.80 is: 161,618.70
Step by Step Solution
- Step 1: Write the proportion equation
212,721.80 : 319,082.70 = 107,745.80 : x - Step 2: Convert to fraction form
212,721.80/319,082.70 = 107,745.80/x - Step 3: Cross multiply
212,721.80x = 319,082.70 × 107,745.80 - Step 4: Simplify right side
212,721.80x = 34,379,820,777.66 - Step 5: Solve for x
x = 34,379,820,777.66/212,721.80 - Step 6: Final answer
x = 161,618.70
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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.