Finding the Fourth Proportional to 128,129.40, 192,194.10 and 122,005.80
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Solution
The fourth proportional to 128,129.40, 192,194.10 and 122,005.80 is: 183,008.70
Step by Step Solution
- Step 1: Write the proportion equation
128,129.40 : 192,194.10 = 122,005.80 : x - Step 2: Convert to fraction form
128,129.40/192,194.10 = 122,005.80/x - Step 3: Cross multiply
128,129.40x = 192,194.10 × 122,005.80 - Step 4: Simplify right side
128,129.40x = 23,448,794,925.78 - Step 5: Solve for x
x = 23,448,794,925.78/128,129.40 - Step 6: Final answer
x = 183,008.70
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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.