Finding the Fourth Proportional to 71,721.14, 107,578.95 and 19,130.18
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Solution
The fourth proportional to 71,721.14, 107,578.95 and 19,130.18 is: 28,694.53
Step by Step Solution
- Step 1: Write the proportion equation
71,721.14 : 107,578.95 = 19,130.18 : x - Step 2: Convert to fraction form
71,721.14/107,578.95 = 19,130.18/x - Step 3: Cross multiply
71,721.14x = 107,578.95 × 19,130.18 - Step 4: Simplify right side
71,721.14x = 2,058,004,139.82 - Step 5: Solve for x
x = 2,058,004,139.82/71,721.14 - Step 6: Final answer
x = 28,694.53
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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.