Finding the Fourth Proportional to 91,207.40, 136,811.10 and 66,129.80
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Solution
The fourth proportional to 91,207.40, 136,811.10 and 66,129.80 is: 99,194.70
Step by Step Solution
- Step 1: Write the proportion equation
91,207.40 : 136,811.10 = 66,129.80 : x - Step 2: Convert to fraction form
91,207.40/136,811.10 = 66,129.80/x - Step 3: Cross multiply
91,207.40x = 136,811.10 × 66,129.80 - Step 4: Simplify right side
91,207.40x = 9,047,290,680.78 - Step 5: Solve for x
x = 9,047,290,680.78/91,207.40 - Step 6: Final answer
x = 99,194.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.