Finding the Fourth Proportional to 212,700.16, 319,122.80 and 133,721.92
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Solution
The fourth proportional to 212,700.16, 319,122.80 and 133,721.92 is: 200,628.50
Step by Step Solution
- Step 1: Write the proportion equation
212,700.16 : 319,122.80 = 133,721.92 : x - Step 2: Convert to fraction form
212,700.16/319,122.80 = 133,721.92/x - Step 3: Cross multiply
212,700.16x = 319,122.80 × 133,721.92 - Step 4: Simplify right side
212,700.16x = 42,673,713,531.78 - Step 5: Solve for x
x = 42,673,713,531.78/212,700.16 - Step 6: Final answer
x = 200,628.50
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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.