Finding the Fourth Proportional to 212,010.84, 317,891.72 and 85,655.09
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Solution
The fourth proportional to 212,010.84, 317,891.72 and 85,655.09 is: 128,432.32
Step by Step Solution
- Step 1: Write the proportion equation
212,010.84 : 317,891.72 = 85,655.09 : x - Step 2: Convert to fraction form
212,010.84/317,891.72 = 85,655.09/x - Step 3: Cross multiply
212,010.84x = 317,891.72 × 85,655.09 - Step 4: Simplify right side
212,010.84x = 27,229,043,886.85 - Step 5: Solve for x
x = 27,229,043,886.85/212,010.84 - Step 6: Final answer
x = 128,432.32
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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.