Finding the Fourth Proportional to 122,728.23, 169,367.25 and 71,745.31
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Solution
The fourth proportional to 122,728.23, 169,367.25 and 71,745.31 is: 99,009.87
Step by Step Solution
- Step 1: Write the proportion equation
122,728.23 : 169,367.25 = 71,745.31 : x - Step 2: Convert to fraction form
122,728.23/169,367.25 = 71,745.31/x - Step 3: Cross multiply
122,728.23x = 169,367.25 × 71,745.31 - Step 4: Simplify right side
122,728.23x = 12,151,306,335.85 - Step 5: Solve for x
x = 12,151,306,335.85/122,728.23 - Step 6: Final answer
x = 99,009.87
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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.