Finding the Fourth Proportional to 78,728,272.99, 118,078,952.45 and 21,207,091.95
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Solution
The fourth proportional to 78,728,272.99, 118,078,952.45 and 21,207,091.95 is: 31,807,012.99
Step by Step Solution
- Step 1: Write the proportion equation
78,728,272.99 : 118,078,952.45 = 21,207,091.95 : x - Step 2: Convert to fraction form
78,728,272.99/118,078,952.45 = 21,207,091.95/x - Step 3: Cross multiply
78,728,272.99x = 118,078,952.45 × 21,207,091.95 - Step 4: Simplify right side
78,728,272.99x = 2,504,111,201,860,792 - Step 5: Solve for x
x = 2,504,111,201,860,792/78,728,272.99 - Step 6: Final answer
x = 31,807,012.99
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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.