Finding the Fourth Proportional to 212,898.67, 318,986.49 and 128,481.46
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Solution
The fourth proportional to 212,898.67, 318,986.49 and 128,481.46 is: 192,504.02
Step by Step Solution
- Step 1: Write the proportion equation
212,898.67 : 318,986.49 = 128,481.46 : x - Step 2: Convert to fraction form
212,898.67/318,986.49 = 128,481.46/x - Step 3: Cross multiply
212,898.67x = 318,986.49 × 128,481.46 - Step 4: Simplify right side
212,898.67x = 40,983,849,955.48 - Step 5: Solve for x
x = 40,983,849,955.48/212,898.67 - Step 6: Final answer
x = 192,504.02
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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.