Finding the Fourth Proportional to 91,145.91, 125,747.80 and 57,155.82
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Solution
The fourth proportional to 91,145.91, 125,747.80 and 57,155.82 is: 78,853.99
Step by Step Solution
- Step 1: Write the proportion equation
91,145.91 : 125,747.80 = 57,155.82 : x - Step 2: Convert to fraction form
91,145.91/125,747.80 = 57,155.82/x - Step 3: Cross multiply
91,145.91x = 125,747.80 × 57,155.82 - Step 4: Simplify right side
91,145.91x = 7,187,218,622.20 - Step 5: Solve for x
x = 7,187,218,622.20/91,145.91 - Step 6: Final answer
x = 78,853.99
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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.