Finding the Fourth Proportional to 76,539.75, 114,816.24 and 21,135.75
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Solution
The fourth proportional to 76,539.75, 114,816.24 and 21,135.75 is: 31,705.45
Step by Step Solution
- Step 1: Write the proportion equation
76,539.75 : 114,816.24 = 21,135.75 : x - Step 2: Convert to fraction form
76,539.75/114,816.24 = 21,135.75/x - Step 3: Cross multiply
76,539.75x = 114,816.24 × 21,135.75 - Step 4: Simplify right side
76,539.75x = 2,426,727,344.58 - Step 5: Solve for x
x = 2,426,727,344.58/76,539.75 - Step 6: Final answer
x = 31,705.45
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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.