Finding the Fourth Proportional to 129,023,906.12, 178,052,911.92 and 71,077,154.12
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Solution
The fourth proportional to 129,023,906.12, 178,052,911.92 and 71,077,154.12 is: 98,086,429.43
Step by Step Solution
- Step 1: Write the proportion equation
129,023,906.12 : 178,052,911.92 = 71,077,154.12 : x - Step 2: Convert to fraction form
129,023,906.12/178,052,911.92 = 71,077,154.12/x - Step 3: Cross multiply
129,023,906.12x = 178,052,911.92 × 71,077,154.12 - Step 4: Simplify right side
129,023,906.12x = 12,655,494,262,052,626 - Step 5: Solve for x
x = 12,655,494,262,052,626/129,023,906.12 - Step 6: Final answer
x = 98,086,429.43
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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.