Finding the Fourth Proportional to 85,992.12, 128,803.50 and 66,124.44
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Solution
The fourth proportional to 85,992.12, 128,803.50 and 66,124.44 is: 99,044.65
Step by Step Solution
- Step 1: Write the proportion equation
85,992.12 : 128,803.50 = 66,124.44 : x - Step 2: Convert to fraction form
85,992.12/128,803.50 = 66,124.44/x - Step 3: Cross multiply
85,992.12x = 128,803.50 × 66,124.44 - Step 4: Simplify right side
85,992.12x = 8,517,059,307.54 - Step 5: Solve for x
x = 8,517,059,307.54/85,992.12 - Step 6: Final answer
x = 99,044.65
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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.