Finding the Fourth Proportional to 212,891.13, 318,975.21 and 128,473.91
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Solution
The fourth proportional to 212,891.13, 318,975.21 and 128,473.91 is: 192,492.71
Step by Step Solution
- Step 1: Write the proportion equation
212,891.13 : 318,975.21 = 128,473.91 : x - Step 2: Convert to fraction form
212,891.13/318,975.21 = 128,473.91/x - Step 3: Cross multiply
212,891.13x = 318,975.21 × 128,473.91 - Step 4: Simplify right side
212,891.13x = 40,979,990,345.12 - Step 5: Solve for x
x = 40,979,990,345.12/212,891.13 - Step 6: Final answer
x = 192,492.71
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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.