Finding the Fourth Proportional to 71,789.60, 107,917.68 and 71,439.68
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Solution
The fourth proportional to 71,789.60, 107,917.68 and 71,439.68 is: 107,391.66
Step by Step Solution
- Step 1: Write the proportion equation
71,789.60 : 107,917.68 = 71,439.68 : x - Step 2: Convert to fraction form
71,789.60/107,917.68 = 71,439.68/x - Step 3: Cross multiply
71,789.60x = 107,917.68 × 71,439.68 - Step 4: Simplify right side
71,789.60x = 7,709,604,525.54 - Step 5: Solve for x
x = 7,709,604,525.54/71,789.60 - Step 6: Final answer
x = 107,391.66
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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.