Finding the Fourth Proportional to 189,211.97, 261,245.91 and 121,403.63
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Solution
The fourth proportional to 189,211.97, 261,245.91 and 121,403.63 is: 167,622.59
Step by Step Solution
- Step 1: Write the proportion equation
189,211.97 : 261,245.91 = 121,403.63 : x - Step 2: Convert to fraction form
189,211.97/261,245.91 = 121,403.63/x - Step 3: Cross multiply
189,211.97x = 261,245.91 × 121,403.63 - Step 4: Simplify right side
189,211.97x = 31,716,200,490.42 - Step 5: Solve for x
x = 31,716,200,490.42/189,211.97 - Step 6: Final answer
x = 167,622.59
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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.