Finding the Fourth Proportional to 121,879.78, 168,163.77 and 76,565.14
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Solution
The fourth proportional to 121,879.78, 168,163.77 and 76,565.14 is: 105,640.84
Step by Step Solution
- Step 1: Write the proportion equation
121,879.78 : 168,163.77 = 76,565.14 : x - Step 2: Convert to fraction form
121,879.78/168,163.77 = 76,565.14/x - Step 3: Cross multiply
121,879.78x = 168,163.77 × 76,565.14 - Step 4: Simplify right side
121,879.78x = 12,875,482,592.98 - Step 5: Solve for x
x = 12,875,482,592.98/121,879.78 - Step 6: Final answer
x = 105,640.84
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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.