Finding the Fourth Proportional to 212,128,639.43, 292,763,006.66 and 128,494,316.09
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Solution
The fourth proportional to 212,128,639.43, 292,763,006.66 and 128,494,316.09 is: 177,337,592.98
Step by Step Solution
- Step 1: Write the proportion equation
212,128,639.43 : 292,763,006.66 = 128,494,316.09 : x - Step 2: Convert to fraction form
212,128,639.43/292,763,006.66 = 128,494,316.09/x - Step 3: Cross multiply
212,128,639.43x = 292,763,006.66 × 128,494,316.09 - Step 4: Simplify right side
212,128,639.43x = 37,618,382,316,734,232 - Step 5: Solve for x
x = 37,618,382,316,734,232/212,128,639.43 - Step 6: Final answer
x = 177,337,592.98
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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.