Finding the Fourth Proportional to 121,511,991.88, 167,686,972.19 and 65,757,398.31
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Solution
The fourth proportional to 121,511,991.88, 167,686,972.19 and 65,757,398.31 is: 90,745,438.80
Step by Step Solution
- Step 1: Write the proportion equation
121,511,991.88 : 167,686,972.19 = 65,757,398.31 : x - Step 2: Convert to fraction form
121,511,991.88/167,686,972.19 = 65,757,398.31/x - Step 3: Cross multiply
121,511,991.88x = 167,686,972.19 × 65,757,398.31 - Step 4: Simplify right side
121,511,991.88x = 11,026,659,021,983,740 - Step 5: Solve for x
x = 11,026,659,021,983,740/121,511,991.88 - Step 6: Final answer
x = 90,745,438.80
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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.