Finding the Fourth Proportional to 79,920.09, 119,748.35 and 71,679.92
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Solution
The fourth proportional to 79,920.09, 119,748.35 and 71,679.92 is: 107,401.68
Step by Step Solution
- Step 1: Write the proportion equation
79,920.09 : 119,748.35 = 71,679.92 : x - Step 2: Convert to fraction form
79,920.09/119,748.35 = 71,679.92/x - Step 3: Cross multiply
79,920.09x = 119,748.35 × 71,679.92 - Step 4: Simplify right side
79,920.09x = 8,583,551,728.59 - Step 5: Solve for x
x = 8,583,551,728.59/79,920.09 - Step 6: Final answer
x = 107,401.68
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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.