Finding the Fourth Proportional to 128,879.10, 193,318.65 and 128,879.10
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Solution
The fourth proportional to 128,879.10, 193,318.65 and 128,879.10 is: 193,318.65
Step by Step Solution
- Step 1: Write the proportion equation
128,879.10 : 193,318.65 = 128,879.10 : x - Step 2: Convert to fraction form
128,879.10/193,318.65 = 128,879.10/x - Step 3: Cross multiply
128,879.10x = 193,318.65 × 128,879.10 - Step 4: Simplify right side
128,879.10x = 24,914,733,625.22 - Step 5: Solve for x
x = 24,914,733,625.22/128,879.10 - Step 6: Final answer
x = 193,318.65
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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.