Finding the Fourth Proportional to 121,520.72, 167,651.84 and 76,119.68
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Solution
The fourth proportional to 121,520.72, 167,651.84 and 76,119.68 is: 105,015.88
Step by Step Solution
- Step 1: Write the proportion equation
121,520.72 : 167,651.84 = 76,119.68 : x - Step 2: Convert to fraction form
121,520.72/167,651.84 = 76,119.68/x - Step 3: Cross multiply
121,520.72x = 167,651.84 × 76,119.68 - Step 4: Simplify right side
121,520.72x = 12,761,605,021.64 - Step 5: Solve for x
x = 12,761,605,021.64/121,520.72 - Step 6: Final answer
x = 105,015.88
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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.