Finding the Fourth Proportional to 121,215,190.20, 181,822,785.30 and 84,864,625.80
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Solution
The fourth proportional to 121,215,190.20, 181,822,785.30 and 84,864,625.80 is: 127,296,938.70
Step by Step Solution
- Step 1: Write the proportion equation
121,215,190.20 : 181,822,785.30 = 84,864,625.80 : x - Step 2: Convert to fraction form
121,215,190.20/181,822,785.30 = 84,864,625.80/x - Step 3: Cross multiply
121,215,190.20x = 181,822,785.30 × 84,864,625.80 - Step 4: Simplify right side
121,215,190.20x = 15,430,322,636,398,242 - Step 5: Solve for x
x = 15,430,322,636,398,242/121,215,190.20 - Step 6: Final answer
x = 127,296,938.70
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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.