Finding the Fourth Proportional to 71,910.98, 107,859.18 and 19,313.63
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Solution
The fourth proportional to 71,910.98, 107,859.18 and 19,313.63 is: 28,968.49
Step by Step Solution
- Step 1: Write the proportion equation
71,910.98 : 107,859.18 = 19,313.63 : x - Step 2: Convert to fraction form
71,910.98/107,859.18 = 19,313.63/x - Step 3: Cross multiply
71,910.98x = 107,859.18 × 19,313.63 - Step 4: Simplify right side
71,910.98x = 2,083,152,294.62 - Step 5: Solve for x
x = 2,083,152,294.62/71,910.98 - Step 6: Final answer
x = 28,968.49
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1.5x scale
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.