Finding the Fourth Proportional to 76,912.80, 115,420.80 and 26,992.80
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Solution
The fourth proportional to 76,912.80, 115,420.80 and 26,992.80 is: 40,507.31
Step by Step Solution
- Step 1: Write the proportion equation
76,912.80 : 115,420.80 = 26,992.80 : x - Step 2: Convert to fraction form
76,912.80/115,420.80 = 26,992.80/x - Step 3: Cross multiply
76,912.80x = 115,420.80 × 26,992.80 - Step 4: Simplify right side
76,912.80x = 3,115,530,570.24 - Step 5: Solve for x
x = 3,115,530,570.24/76,912.80 - Step 6: Final answer
x = 40,507.31
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1.5x scale
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.