Finding the Fourth Proportional to 91,171.53, 136,770.93 and 31,996.80
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Solution
The fourth proportional to 91,171.53, 136,770.93 and 31,996.80 is: 47,999.99
Step by Step Solution
- Step 1: Write the proportion equation
91,171.53 : 136,770.93 = 31,996.80 : x - Step 2: Convert to fraction form
91,171.53/136,770.93 = 31,996.80/x - Step 3: Cross multiply
91,171.53x = 136,770.93 × 31,996.80 - Step 4: Simplify right side
91,171.53x = 4,376,232,093.02 - Step 5: Solve for x
x = 4,376,232,093.02/91,171.53 - Step 6: Final answer
x = 47,999.99
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1.5x scale
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.