Finding the Fourth Proportional to 84,585.80, 126,878.70 and 76,809.80
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Solution
The fourth proportional to 84,585.80, 126,878.70 and 76,809.80 is: 115,214.70
Step by Step Solution
- Step 1: Write the proportion equation
84,585.80 : 126,878.70 = 76,809.80 : x - Step 2: Convert to fraction form
84,585.80/126,878.70 = 76,809.80/x - Step 3: Cross multiply
84,585.80x = 126,878.70 × 76,809.80 - Step 4: Simplify right side
84,585.80x = 9,745,527,571.26 - Step 5: Solve for x
x = 9,745,527,571.26/84,585.80 - Step 6: Final answer
x = 115,214.70
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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.