Finding the Fourth Proportional to 128,606,491,323.54, 177,477,105,163.86 and 71,512,575,995.75
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Solution
The fourth proportional to 128,606,491,323.54, 177,477,105,163.86 and 71,512,575,995.75 is: 98,687,436,690.94
Step by Step Solution
- Step 1: Write the proportion equation
128,606,491,323.54 : 177,477,105,163.86 = 71,512,575,995.75 : x - Step 2: Convert to fraction form
128,606,491,323.54/177,477,105,163.86 = 71,512,575,995.75/x - Step 3: Cross multiply
128,606,491,323.54x = 177,477,105,163.86 × 71,512,575,995.75 - Step 4: Simplify right side
128,606,491,323.54x = 12,691,844,970,535,364,591,616 - Step 5: Solve for x
x = 12,691,844,970,535,364,591,616/128,606,491,323.54 - Step 6: Final answer
x = 98,687,436,690.94
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1.5x scale
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.