Finding the Fourth Proportional to 128,326,821.20, 192,490,231.80 and 99,661,374.80
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Solution
The fourth proportional to 128,326,821.20, 192,490,231.80 and 99,661,374.80 is: 149,492,062.20
Step by Step Solution
- Step 1: Write the proportion equation
128,326,821.20 : 192,490,231.80 = 99,661,374.80 : x - Step 2: Convert to fraction form
128,326,821.20/192,490,231.80 = 99,661,374.80/x - Step 3: Cross multiply
128,326,821.20x = 192,490,231.80 × 99,661,374.80 - Step 4: Simplify right side
128,326,821.20x = 19,183,841,136,758,680 - Step 5: Solve for x
x = 19,183,841,136,758,680/128,326,821.20 - Step 6: Final answer
x = 149,492,062.20
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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.