Finding the Fourth Proportional to 212,639.99, 319,093.49 and 86,280.74
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Solution
The fourth proportional to 212,639.99, 319,093.49 and 86,280.74 is: 129,475.28
Step by Step Solution
- Step 1: Write the proportion equation
212,639.99 : 319,093.49 = 86,280.74 : x - Step 2: Convert to fraction form
212,639.99/319,093.49 = 86,280.74/x - Step 3: Cross multiply
212,639.99x = 319,093.49 × 86,280.74 - Step 4: Simplify right side
212,639.99x = 27,531,622,446.38 - Step 5: Solve for x
x = 27,531,622,446.38/212,639.99 - Step 6: Final answer
x = 129,475.28
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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.