Finding the Fourth Proportional to 212,728.66, 319,148.34 and 79,619.20
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Solution
The fourth proportional to 212,728.66, 319,148.34 and 79,619.20 is: 119,449.52
Step by Step Solution
- Step 1: Write the proportion equation
212,728.66 : 319,148.34 = 79,619.20 : x - Step 2: Convert to fraction form
212,728.66/319,148.34 = 79,619.20/x - Step 3: Cross multiply
212,728.66x = 319,148.34 × 79,619.20 - Step 4: Simplify right side
212,728.66x = 25,410,335,512.13 - Step 5: Solve for x
x = 25,410,335,512.13/212,728.66 - Step 6: Final answer
x = 119,449.52
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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.