Finding the Fourth Proportional to 80,861.70, 121,292.55 and 79,133.70
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Solution
The fourth proportional to 80,861.70, 121,292.55 and 79,133.70 is: 118,700.55
Step by Step Solution
- Step 1: Write the proportion equation
80,861.70 : 121,292.55 = 79,133.70 : x - Step 2: Convert to fraction form
80,861.70/121,292.55 = 79,133.70/x - Step 3: Cross multiply
80,861.70x = 121,292.55 × 79,133.70 - Step 4: Simplify right side
80,861.70x = 9,598,328,263.94 - Step 5: Solve for x
x = 9,598,328,263.94/80,861.70 - Step 6: Final answer
x = 118,700.55
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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.