Finding the Fourth Proportional to 128,081.58, 192,080.84 and 42,669.66
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Solution
The fourth proportional to 128,081.58, 192,080.84 and 42,669.66 is: 63,990.65
Step by Step Solution
- Step 1: Write the proportion equation
128,081.58 : 192,080.84 = 42,669.66 : x - Step 2: Convert to fraction form
128,081.58/192,080.84 = 42,669.66/x - Step 3: Cross multiply
128,081.58x = 192,080.84 × 42,669.66 - Step 4: Simplify right side
128,081.58x = 8,196,024,135.31 - Step 5: Solve for x
x = 8,196,024,135.31/128,081.58 - Step 6: Final answer
x = 63,990.65
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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.