Finding the Fourth Proportional to 71,572.91, 107,351.15 and 18,986.49
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Solution
The fourth proportional to 71,572.91, 107,351.15 and 18,986.49 is: 28,477.56
Step by Step Solution
- Step 1: Write the proportion equation
71,572.91 : 107,351.15 = 18,986.49 : x - Step 2: Convert to fraction form
71,572.91/107,351.15 = 18,986.49/x - Step 3: Cross multiply
71,572.91x = 107,351.15 × 18,986.49 - Step 4: Simplify right side
71,572.91x = 2,038,221,441.03 - Step 5: Solve for x
x = 2,038,221,441.03/71,572.91 - Step 6: Final answer
x = 28,477.56
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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.