Finding the Fourth Proportional to 85,715.76, 128,451.14 and 48,197.09
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Solution
The fourth proportional to 85,715.76, 128,451.14 and 48,197.09 is: 72,226.76
Step by Step Solution
- Step 1: Write the proportion equation
85,715.76 : 128,451.14 = 48,197.09 : x - Step 2: Convert to fraction form
85,715.76/128,451.14 = 48,197.09/x - Step 3: Cross multiply
85,715.76x = 128,451.14 × 48,197.09 - Step 4: Simplify right side
85,715.76x = 6,190,971,670.07 - Step 5: Solve for x
x = 6,190,971,670.07/85,715.76 - Step 6: Final answer
x = 72,226.76
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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.