Finding the Fourth Proportional to 138,738,891.12, 191,471,427.08 and 76,878,633.84
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Solution
The fourth proportional to 138,738,891.12, 191,471,427.08 and 76,878,633.84 is: 106,099,029.73
Step by Step Solution
- Step 1: Write the proportion equation
138,738,891.12 : 191,471,427.08 = 76,878,633.84 : x - Step 2: Convert to fraction form
138,738,891.12/191,471,427.08 = 76,878,633.84/x - Step 3: Cross multiply
138,738,891.12x = 191,471,427.08 × 76,878,633.84 - Step 4: Simplify right side
138,738,891.12x = 14,720,061,733,305,582 - Step 5: Solve for x
x = 14,720,061,733,305,582/138,738,891.12 - Step 6: Final answer
x = 106,099,029.73
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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.