Finding the Fourth Proportional to 206,915,629.58, 285,436,708.80 and 128,569,416.38
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Solution
The fourth proportional to 206,915,629.58, 285,436,708.80 and 128,569,416.38 is: 177,359,395.90
Step by Step Solution
- Step 1: Write the proportion equation
206,915,629.58 : 285,436,708.80 = 128,569,416.38 : x - Step 2: Convert to fraction form
206,915,629.58/285,436,708.80 = 128,569,416.38/x - Step 3: Cross multiply
206,915,629.58x = 285,436,708.80 × 128,569,416.38 - Step 4: Simplify right side
206,915,629.58x = 36,698,431,063,844,008 - Step 5: Solve for x
x = 36,698,431,063,844,008/206,915,629.58 - Step 6: Final answer
x = 177,359,395.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.