Finding the Fourth Proportional to 158,687.19, 218,991.90 and 87,066.99
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Solution
The fourth proportional to 158,687.19, 218,991.90 and 87,066.99 is: 120,154.41
Step by Step Solution
- Step 1: Write the proportion equation
158,687.19 : 218,991.90 = 87,066.99 : x - Step 2: Convert to fraction form
158,687.19/218,991.90 = 87,066.99/x - Step 3: Cross multiply
158,687.19x = 218,991.90 × 87,066.99 - Step 4: Simplify right side
158,687.19x = 19,066,965,567.38 - Step 5: Solve for x
x = 19,066,965,567.38/158,687.19 - Step 6: Final answer
x = 120,154.41
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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.