Finding the Fourth Proportional to 85,874.99, 128,701.60 and 38,455.43
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Solution
The fourth proportional to 85,874.99, 128,701.60 and 38,455.43 is: 57,633.48
Step by Step Solution
- Step 1: Write the proportion equation
85,874.99 : 128,701.60 = 38,455.43 : x - Step 2: Convert to fraction form
85,874.99/128,701.60 = 38,455.43/x - Step 3: Cross multiply
85,874.99x = 128,701.60 × 38,455.43 - Step 4: Simplify right side
85,874.99x = 4,949,274,630.04 - Step 5: Solve for x
x = 4,949,274,630.04/85,874.99 - Step 6: Final answer
x = 57,633.48
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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.