Finding the Fourth Proportional to 85,655.02, 128,481.81 and 66,950.79
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Solution
The fourth proportional to 85,655.02, 128,481.81 and 66,950.79 is: 100,425.62
Step by Step Solution
- Step 1: Write the proportion equation
85,655.02 : 128,481.81 = 66,950.79 : x - Step 2: Convert to fraction form
85,655.02/128,481.81 = 66,950.79/x - Step 3: Cross multiply
85,655.02x = 128,481.81 × 66,950.79 - Step 4: Simplify right side
85,655.02x = 8,601,958,680.13 - Step 5: Solve for x
x = 8,601,958,680.13/85,655.02 - Step 6: Final answer
x = 100,425.62
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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.