Finding the Fourth Proportional to 218,021.15, 300,894.12 and 121,234.65
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Solution
The fourth proportional to 218,021.15, 300,894.12 and 121,234.65 is: 167,317.69
Step by Step Solution
- Step 1: Write the proportion equation
218,021.15 : 300,894.12 = 121,234.65 : x - Step 2: Convert to fraction form
218,021.15/300,894.12 = 121,234.65/x - Step 3: Cross multiply
218,021.15x = 300,894.12 × 121,234.65 - Step 4: Simplify right side
218,021.15x = 36,478,793,325.26 - Step 5: Solve for x
x = 36,478,793,325.26/218,021.15 - Step 6: Final answer
x = 167,317.69
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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.