Finding the Fourth Proportional to 71,315.94, 106,969.59 and 18,724.26
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Solution
The fourth proportional to 71,315.94, 106,969.59 and 18,724.26 is: 28,085.26
Step by Step Solution
- Step 1: Write the proportion equation
71,315.94 : 106,969.59 = 18,724.26 : x - Step 2: Convert to fraction form
71,315.94/106,969.59 = 18,724.26/x - Step 3: Cross multiply
71,315.94x = 106,969.59 × 18,724.26 - Step 4: Simplify right side
71,315.94x = 2,002,926,415.25 - Step 5: Solve for x
x = 2,002,926,415.25/71,315.94 - Step 6: Final answer
x = 28,085.26
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.