Finding the Fourth Proportional to 85,703.58, 128,295.92 and 77,806.08
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Solution
The fourth proportional to 85,703.58, 128,295.92 and 77,806.08 is: 116,473.58
Step by Step Solution
- Step 1: Write the proportion equation
85,703.58 : 128,295.92 = 77,806.08 : x - Step 2: Convert to fraction form
85,703.58/128,295.92 = 77,806.08/x - Step 3: Cross multiply
85,703.58x = 128,295.92 × 77,806.08 - Step 4: Simplify right side
85,703.58x = 9,982,202,615.19 - Step 5: Solve for x
x = 9,982,202,615.19/85,703.58 - Step 6: Final answer
x = 116,473.58
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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.