Finding the Fourth Proportional to 85,815.29, 128,691.35 and 29,640.98
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Solution
The fourth proportional to 85,815.29, 128,691.35 and 29,640.98 is: 44,450.56
Step by Step Solution
- Step 1: Write the proportion equation
85,815.29 : 128,691.35 = 29,640.98 : x - Step 2: Convert to fraction form
85,815.29/128,691.35 = 29,640.98/x - Step 3: Cross multiply
85,815.29x = 128,691.35 × 29,640.98 - Step 4: Simplify right side
85,815.29x = 3,814,538,016.20 - Step 5: Solve for x
x = 3,814,538,016.20/85,815.29 - Step 6: Final answer
x = 44,450.56
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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.