Finding the Fourth Proportional to 128,480,755.92, 177,303,669.80 and 69,743,461.72
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Solution
The fourth proportional to 128,480,755.92, 177,303,669.80 and 69,743,461.72 is: 96,246,100.20
Step by Step Solution
- Step 1: Write the proportion equation
128,480,755.92 : 177,303,669.80 = 69,743,461.72 : x - Step 2: Convert to fraction form
128,480,755.92/177,303,669.80 = 69,743,461.72/x - Step 3: Cross multiply
128,480,755.92x = 177,303,669.80 × 69,743,461.72 - Step 4: Simplify right side
128,480,755.92x = 12,365,771,707,511,820 - Step 5: Solve for x
x = 12,365,771,707,511,820/128,480,755.92 - Step 6: Final answer
x = 96,246,100.20
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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.