Finding the Fourth Proportional to 122,908.68, 169,429.68 and 100,212.84
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Solution
The fourth proportional to 122,908.68, 169,429.68 and 100,212.84 is: 138,143.45
Step by Step Solution
- Step 1: Write the proportion equation
122,908.68 : 169,429.68 = 100,212.84 : x - Step 2: Convert to fraction form
122,908.68/169,429.68 = 100,212.84/x - Step 3: Cross multiply
122,908.68x = 169,429.68 × 100,212.84 - Step 4: Simplify right side
122,908.68x = 16,979,029,413.09 - Step 5: Solve for x
x = 16,979,029,413.09/122,908.68 - Step 6: Final answer
x = 138,143.45
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1.5x scale
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.