Finding the Fourth Proportional to 85,452.12, 128,157.12 and 38,695.68
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Solution
The fourth proportional to 85,452.12, 128,157.12 and 38,695.68 is: 58,033.98
Step by Step Solution
- Step 1: Write the proportion equation
85,452.12 : 128,157.12 = 38,695.68 : x - Step 2: Convert to fraction form
85,452.12/128,157.12 = 38,695.68/x - Step 3: Cross multiply
85,452.12x = 128,157.12 × 38,695.68 - Step 4: Simplify right side
85,452.12x = 4,959,126,905.24 - Step 5: Solve for x
x = 4,959,126,905.24/85,452.12 - Step 6: Final answer
x = 58,033.98
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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.