Finding the Fourth Proportional to 84,611.80, 126,917.70 and 74,770.30
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Solution
The fourth proportional to 84,611.80, 126,917.70 and 74,770.30 is: 112,155.45
Step by Step Solution
- Step 1: Write the proportion equation
84,611.80 : 126,917.70 = 74,770.30 : x - Step 2: Convert to fraction form
84,611.80/126,917.70 = 74,770.30/x - Step 3: Cross multiply
84,611.80x = 126,917.70 × 74,770.30 - Step 4: Simplify right side
84,611.80x = 9,489,674,504.31 - Step 5: Solve for x
x = 9,489,674,504.31/84,611.80 - Step 6: Final answer
x = 112,155.45
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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.