Finding the Fourth Proportional to 121,728.26, 167,972.69 and 83,520.70
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Solution
The fourth proportional to 121,728.26, 167,972.69 and 83,520.70 is: 115,250.12
Step by Step Solution
- Step 1: Write the proportion equation
121,728.26 : 167,972.69 = 83,520.70 : x - Step 2: Convert to fraction form
121,728.26/167,972.69 = 83,520.70/x - Step 3: Cross multiply
121,728.26x = 167,972.69 × 83,520.70 - Step 4: Simplify right side
121,728.26x = 14,029,196,438.55 - Step 5: Solve for x
x = 14,029,196,438.55/121,728.26 - Step 6: Final answer
x = 115,250.12
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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.