Finding the Fourth Proportional to 122,168,883.21, 168,647,405.70 and 72,625,295.98
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Solution
The fourth proportional to 122,168,883.21, 168,647,405.70 and 72,625,295.98 is: 100,255,215.84
Step by Step Solution
- Step 1: Write the proportion equation
122,168,883.21 : 168,647,405.70 = 72,625,295.98 : x - Step 2: Convert to fraction form
122,168,883.21/168,647,405.70 = 72,625,295.98/x - Step 3: Cross multiply
122,168,883.21x = 168,647,405.70 × 72,625,295.98 - Step 4: Simplify right side
122,168,883.21x = 12,248,067,755,221,638 - Step 5: Solve for x
x = 12,248,067,755,221,638/122,168,883.21 - Step 6: Final answer
x = 100,255,215.84
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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.