Finding the Fourth Proportional to 78,584,711.70, 117,877,067.55 and 40,320,959.70
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Solution
The fourth proportional to 78,584,711.70, 117,877,067.55 and 40,320,959.70 is: 60,481,439.55
Step by Step Solution
- Step 1: Write the proportion equation
78,584,711.70 : 117,877,067.55 = 40,320,959.70 : x - Step 2: Convert to fraction form
78,584,711.70/117,877,067.55 = 40,320,959.70/x - Step 3: Cross multiply
78,584,711.70x = 117,877,067.55 × 40,320,959.70 - Step 4: Simplify right side
78,584,711.70x = 4,752,916,490,237,728 - Step 5: Solve for x
x = 4,752,916,490,237,728/78,584,711.70 - Step 6: Final answer
x = 60,481,439.55
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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.