Finding the Fourth Proportional to 201,909.80, 278,635.92 and 121,338.56
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Solution
The fourth proportional to 201,909.80, 278,635.92 and 121,338.56 is: 167,447.45
Step by Step Solution
- Step 1: Write the proportion equation
201,909.80 : 278,635.92 = 121,338.56 : x - Step 2: Convert to fraction form
201,909.80/278,635.92 = 121,338.56/x - Step 3: Cross multiply
201,909.80x = 278,635.92 × 121,338.56 - Step 4: Simplify right side
201,909.80x = 33,809,281,297.08 - Step 5: Solve for x
x = 33,809,281,297.08/201,909.80 - Step 6: Final answer
x = 167,447.45
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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.