Finding the Fourth Proportional to 78,414,906.80, 117,622,360.20 and 74,887,713.20
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Solution
The fourth proportional to 78,414,906.80, 117,622,360.20 and 74,887,713.20 is: 112,331,569.80
Step by Step Solution
- Step 1: Write the proportion equation
78,414,906.80 : 117,622,360.20 = 74,887,713.20 : x - Step 2: Convert to fraction form
78,414,906.80/117,622,360.20 = 74,887,713.20/x - Step 3: Cross multiply
78,414,906.80x = 117,622,360.20 × 74,887,713.20 - Step 4: Simplify right side
78,414,906.80x = 8,808,469,576,564,695 - Step 5: Solve for x
x = 8,808,469,576,564,695/78,414,906.80 - Step 6: Final answer
x = 112,331,569.80
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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.