Finding the Fourth Proportional to 80,878.09, 121,313.49 and 30,981.70
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Solution
The fourth proportional to 80,878.09, 121,313.49 and 30,981.70 is: 46,471.15
Step by Step Solution
- Step 1: Write the proportion equation
80,878.09 : 121,313.49 = 30,981.70 : x - Step 2: Convert to fraction form
80,878.09/121,313.49 = 30,981.70/x - Step 3: Cross multiply
80,878.09x = 121,313.49 × 30,981.70 - Step 4: Simplify right side
80,878.09x = 3,758,498,153.13 - Step 5: Solve for x
x = 3,758,498,153.13/80,878.09 - Step 6: Final answer
x = 46,471.15
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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.