Finding the Fourth Proportional to 231,988.61, 320,138.95 and 135,186.30
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Solution
The fourth proportional to 231,988.61, 320,138.95 and 135,186.30 is: 186,553.99
Step by Step Solution
- Step 1: Write the proportion equation
231,988.61 : 320,138.95 = 135,186.30 : x - Step 2: Convert to fraction form
231,988.61/320,138.95 = 135,186.30/x - Step 3: Cross multiply
231,988.61x = 320,138.95 × 135,186.30 - Step 4: Simplify right side
231,988.61x = 43,278,400,136.39 - Step 5: Solve for x
x = 43,278,400,136.39/231,988.61 - Step 6: Final answer
x = 186,553.99
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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.