Finding the Fourth Proportional to 81,805.20, 122,707.80 and 68,683.20
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Solution
The fourth proportional to 81,805.20, 122,707.80 and 68,683.20 is: 103,024.80
Step by Step Solution
- Step 1: Write the proportion equation
81,805.20 : 122,707.80 = 68,683.20 : x - Step 2: Convert to fraction form
81,805.20/122,707.80 = 68,683.20/x - Step 3: Cross multiply
81,805.20x = 122,707.80 × 68,683.20 - Step 4: Simplify right side
81,805.20x = 8,427,964,368.96 - Step 5: Solve for x
x = 8,427,964,368.96/81,805.20 - Step 6: Final answer
x = 103,024.80
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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.