Finding the Fourth Proportional to 100,125.19, 138,007.79 and 71,063.60
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Solution
The fourth proportional to 100,125.19, 138,007.79 and 71,063.60 is: 97,950.68
Step by Step Solution
- Step 1: Write the proportion equation
100,125.19 : 138,007.79 = 71,063.60 : x - Step 2: Convert to fraction form
100,125.19/138,007.79 = 71,063.60/x - Step 3: Cross multiply
100,125.19x = 138,007.79 × 71,063.60 - Step 4: Simplify right side
100,125.19x = 9,807,330,671.08 - Step 5: Solve for x
x = 9,807,330,671.08/100,125.19 - Step 6: Final answer
x = 97,950.68
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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.