Finding the Fourth Proportional to 122,989.94, 169,668.09 and 71,971.08
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Solution
The fourth proportional to 122,989.94, 169,668.09 and 71,971.08 is: 99,286.14
Step by Step Solution
- Step 1: Write the proportion equation
122,989.94 : 169,668.09 = 71,971.08 : x - Step 2: Convert to fraction form
122,989.94/169,668.09 = 71,971.08/x - Step 3: Cross multiply
122,989.94x = 169,668.09 × 71,971.08 - Step 4: Simplify right side
122,989.94x = 12,211,195,678.84 - Step 5: Solve for x
x = 12,211,195,678.84/122,989.94 - Step 6: Final answer
x = 99,286.14
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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.