Finding the Fourth Proportional to 128,321.49, 192,480.12 and 38,364.41
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Solution
The fourth proportional to 128,321.49, 192,480.12 and 38,364.41 is: 57,545.99
Step by Step Solution
- Step 1: Write the proportion equation
128,321.49 : 192,480.12 = 38,364.41 : x - Step 2: Convert to fraction form
128,321.49/192,480.12 = 38,364.41/x - Step 3: Cross multiply
128,321.49x = 192,480.12 × 38,364.41 - Step 4: Simplify right side
128,321.49x = 7,384,386,775.91 - Step 5: Solve for x
x = 7,384,386,775.91/128,321.49 - Step 6: Final answer
x = 57,545.99
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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.