Finding the Fourth Proportional to 76,912.44, 106,139.19 and 42,457.19
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Solution
The fourth proportional to 76,912.44, 106,139.19 and 42,457.19 is: 58,590.94
Step by Step Solution
- Step 1: Write the proportion equation
76,912.44 : 106,139.19 = 42,457.19 : x - Step 2: Convert to fraction form
76,912.44/106,139.19 = 42,457.19/x - Step 3: Cross multiply
76,912.44x = 106,139.19 × 42,457.19 - Step 4: Simplify right side
76,912.44x = 4,506,372,021.62 - Step 5: Solve for x
x = 4,506,372,021.62/76,912.44 - Step 6: Final answer
x = 58,590.94
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.