Finding the Fourth Proportional to 85,475.58, 128,110.92 and 39,821.70
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Solution
The fourth proportional to 85,475.58, 128,110.92 and 39,821.70 is: 59,684.82
Step by Step Solution
- Step 1: Write the proportion equation
85,475.58 : 128,110.92 = 39,821.70 : x - Step 2: Convert to fraction form
85,475.58/128,110.92 = 39,821.70/x - Step 3: Cross multiply
85,475.58x = 128,110.92 × 39,821.70 - Step 4: Simplify right side
85,475.58x = 5,101,594,622.96 - Step 5: Solve for x
x = 5,101,594,622.96/85,475.58 - Step 6: Final answer
x = 59,684.82
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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.