Finding the Fourth Proportional to 212,711.48, 318,874.11 and 106,128.03
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Solution
The fourth proportional to 212,711.48, 318,874.11 and 106,128.03 is: 159,095.70
Step by Step Solution
- Step 1: Write the proportion equation
212,711.48 : 318,874.11 = 106,128.03 : x - Step 2: Convert to fraction form
212,711.48/318,874.11 = 106,128.03/x - Step 3: Cross multiply
212,711.48x = 318,874.11 × 106,128.03 - Step 4: Simplify right side
212,711.48x = 33,841,481,112.30 - Step 5: Solve for x
x = 33,841,481,112.30/212,711.48 - Step 6: Final answer
x = 159,095.70
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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.