Finding the Fourth Proportional to 84,007.80, 126,011.70 and 76,231.80
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Solution
The fourth proportional to 84,007.80, 126,011.70 and 76,231.80 is: 114,347.70
Step by Step Solution
- Step 1: Write the proportion equation
84,007.80 : 126,011.70 = 76,231.80 : x - Step 2: Convert to fraction form
84,007.80/126,011.70 = 76,231.80/x - Step 3: Cross multiply
84,007.80x = 126,011.70 × 76,231.80 - Step 4: Simplify right side
84,007.80x = 9,606,098,712.06 - Step 5: Solve for x
x = 9,606,098,712.06/84,007.80 - Step 6: Final answer
x = 114,347.70
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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.