Finding the Fourth Proportional to 157,906.84, 217,911.18 and 86,286.88
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Solution
The fourth proportional to 157,906.84, 217,911.18 and 86,286.88 is: 119,075.75
Step by Step Solution
- Step 1: Write the proportion equation
157,906.84 : 217,911.18 = 86,286.88 : x - Step 2: Convert to fraction form
157,906.84/217,911.18 = 86,286.88/x - Step 3: Cross multiply
157,906.84x = 217,911.18 × 86,286.88 - Step 4: Simplify right side
157,906.84x = 18,802,875,839.32 - Step 5: Solve for x
x = 18,802,875,839.32/157,906.84 - Step 6: Final answer
x = 119,075.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.