Finding the Fourth Proportional to 199,123.20, 274,745.52 and 121,639.68
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Solution
The fourth proportional to 199,123.20, 274,745.52 and 121,639.68 is: 167,835.58
Step by Step Solution
- Step 1: Write the proportion equation
199,123.20 : 274,745.52 = 121,639.68 : x - Step 2: Convert to fraction form
199,123.20/274,745.52 = 121,639.68/x - Step 3: Cross multiply
199,123.20x = 274,745.52 × 121,639.68 - Step 4: Simplify right side
199,123.20x = 33,419,957,134.23 - Step 5: Solve for x
x = 33,419,957,134.23/199,123.20 - Step 6: Final answer
x = 167,835.58
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.