Finding the Fourth Proportional to 129,337.20, 193,890.60 and 76,690.80
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Solution
The fourth proportional to 129,337.20, 193,890.60 and 76,690.80 is: 114,967.89
Step by Step Solution
- Step 1: Write the proportion equation
129,337.20 : 193,890.60 = 76,690.80 : x - Step 2: Convert to fraction form
129,337.20/193,890.60 = 76,690.80/x - Step 3: Cross multiply
129,337.20x = 193,890.60 × 76,690.80 - Step 4: Simplify right side
129,337.20x = 14,869,625,226.48 - Step 5: Solve for x
x = 14,869,625,226.48/129,337.20 - Step 6: Final answer
x = 114,967.89
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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.