Finding the Fourth Proportional to 129,869.70, 194,804.55 and 107,999.70
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Solution
The fourth proportional to 129,869.70, 194,804.55 and 107,999.70 is: 161,999.55
Step by Step Solution
- Step 1: Write the proportion equation
129,869.70 : 194,804.55 = 107,999.70 : x - Step 2: Convert to fraction form
129,869.70/194,804.55 = 107,999.70/x - Step 3: Cross multiply
129,869.70x = 194,804.55 × 107,999.70 - Step 4: Simplify right side
129,869.70x = 21,038,832,958.64 - Step 5: Solve for x
x = 21,038,832,958.64/129,869.70 - Step 6: Final answer
x = 161,999.55
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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.