Finding the Fourth Proportional to 128,350,733.89, 177,128,022.24 and 72,595,063.28
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Solution
The fourth proportional to 128,350,733.89, 177,128,022.24 and 72,595,063.28 is: 100,183,455.08
Step by Step Solution
- Step 1: Write the proportion equation
128,350,733.89 : 177,128,022.24 = 72,595,063.28 : x - Step 2: Convert to fraction form
128,350,733.89/177,128,022.24 = 72,595,063.28/x - Step 3: Cross multiply
128,350,733.89x = 177,128,022.24 × 72,595,063.28 - Step 4: Simplify right side
128,350,733.89x = 12,858,619,983,550,560 - Step 5: Solve for x
x = 12,858,619,983,550,560/128,350,733.89 - Step 6: Final answer
x = 100,183,455.08
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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.