Finding the Fourth Proportional to 138,738,890.10, 191,471,425.68 and 76,878,632.82
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Solution
The fourth proportional to 138,738,890.10, 191,471,425.68 and 76,878,632.82 is: 106,099,028.32
Step by Step Solution
- Step 1: Write the proportion equation
138,738,890.10 : 191,471,425.68 = 76,878,632.82 : x - Step 2: Convert to fraction form
138,738,890.10/191,471,425.68 = 76,878,632.82/x - Step 3: Cross multiply
138,738,890.10x = 191,471,425.68 × 76,878,632.82 - Step 4: Simplify right side
138,738,890.10x = 14,720,061,430,374,638 - Step 5: Solve for x
x = 14,720,061,430,374,638/138,738,890.10 - Step 6: Final answer
x = 106,099,028.32
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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.