Finding the Fourth Proportional to 311,661,659.88, 430,105,750.74 and 172,430,154
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Solution
The fourth proportional to 311,661,659.88, 430,105,750.74 and 172,430,154 is: 237,960,616.86
Step by Step Solution
- Step 1: Write the proportion equation
311,661,659.88 : 430,105,750.74 = 172,430,154 : x - Step 2: Convert to fraction form
311,661,659.88/430,105,750.74 = 172,430,154/x - Step 3: Cross multiply
311,661,659.88x = 430,105,750.74 × 172,430,154 - Step 4: Simplify right side
311,661,659.88x = 74,163,200,836,383,808 - Step 5: Solve for x
x = 74,163,200,836,383,808/311,661,659.88 - Step 6: Final answer
x = 237,960,616.86
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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.