Finding the Fourth Proportional to 87,718.15, 121,064.69 and 57,590.85
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Solution
The fourth proportional to 87,718.15, 121,064.69 and 57,590.85 is: 79,484.33
Step by Step Solution
- Step 1: Write the proportion equation
87,718.15 : 121,064.69 = 57,590.85 : x - Step 2: Convert to fraction form
87,718.15/121,064.69 = 57,590.85/x - Step 3: Cross multiply
87,718.15x = 121,064.69 × 57,590.85 - Step 4: Simplify right side
87,718.15x = 6,972,218,114.13 - Step 5: Solve for x
x = 6,972,218,114.13/87,718.15 - Step 6: Final answer
x = 79,484.33
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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.