Finding the Fourth Proportional to 138,738,878.10, 191,471,409.09 and 76,878,620.82
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Solution
The fourth proportional to 138,738,878.10, 191,471,409.09 and 76,878,620.82 is: 106,099,011.75
Step by Step Solution
- Step 1: Write the proportion equation
138,738,878.10 : 191,471,409.09 = 76,878,620.82 : x - Step 2: Convert to fraction form
138,738,878.10/191,471,409.09 = 76,878,620.82/x - Step 3: Cross multiply
138,738,878.10x = 191,471,409.09 × 76,878,620.82 - Step 4: Simplify right side
138,738,878.10x = 14,720,057,857,301,210 - Step 5: Solve for x
x = 14,720,057,857,301,210/138,738,878.10 - Step 6: Final answer
x = 106,099,011.75
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.