Finding the Fourth Proportional to 87,759.81, 121,109.13 and 53,768.36
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Solution
The fourth proportional to 87,759.81, 121,109.13 and 53,768.36 is: 74,200.70
Step by Step Solution
- Step 1: Write the proportion equation
87,759.81 : 121,109.13 = 53,768.36 : x - Step 2: Convert to fraction form
87,759.81/121,109.13 = 53,768.36/x - Step 3: Cross multiply
87,759.81x = 121,109.13 × 53,768.36 - Step 4: Simplify right side
87,759.81x = 6,511,839,301.13 - Step 5: Solve for x
x = 6,511,839,301.13/87,759.81 - Step 6: Final answer
x = 74,200.70
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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.