Finding the Fourth Proportional to 128,894,943.40, 193,342,415.10 and 77,934,149.80
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Solution
The fourth proportional to 128,894,943.40, 193,342,415.10 and 77,934,149.80 is: 116,901,224.70
Step by Step Solution
- Step 1: Write the proportion equation
128,894,943.40 : 193,342,415.10 = 77,934,149.80 : x - Step 2: Convert to fraction form
128,894,943.40/193,342,415.10 = 77,934,149.80/x - Step 3: Cross multiply
128,894,943.40x = 193,342,415.10 × 77,934,149.80 - Step 4: Simplify right side
128,894,943.40x = 15,067,976,741,097,180 - Step 5: Solve for x
x = 15,067,976,741,097,180/128,894,943.40 - Step 6: Final answer
x = 116,901,224.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.