Finding the Fourth Proportional to 85,847.80, 128,771.70 and 73,163.20
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Solution
The fourth proportional to 85,847.80, 128,771.70 and 73,163.20 is: 109,744.80
Step by Step Solution
- Step 1: Write the proportion equation
85,847.80 : 128,771.70 = 73,163.20 : x - Step 2: Convert to fraction form
85,847.80/128,771.70 = 73,163.20/x - Step 3: Cross multiply
85,847.80x = 128,771.70 × 73,163.20 - Step 4: Simplify right side
85,847.80x = 9,421,349,641.44 - Step 5: Solve for x
x = 9,421,349,641.44/85,847.80 - Step 6: Final answer
x = 109,744.80
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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.