Finding the Fourth Proportional to 121,599.20, 167,809.73 and 76,279.09
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Solution
The fourth proportional to 121,599.20, 167,809.73 and 76,279.09 is: 105,266.92
Step by Step Solution
- Step 1: Write the proportion equation
121,599.20 : 167,809.73 = 76,279.09 : x - Step 2: Convert to fraction form
121,599.20/167,809.73 = 76,279.09/x - Step 3: Cross multiply
121,599.20x = 167,809.73 × 76,279.09 - Step 4: Simplify right side
121,599.20x = 12,800,373,497.55 - Step 5: Solve for x
x = 12,800,373,497.55/121,599.20 - Step 6: Final answer
x = 105,266.92
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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.