Finding the Fourth Proportional to 87,688.14, 121,021.49 and 49,455.54
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Solution
The fourth proportional to 87,688.14, 121,021.49 and 49,455.54 is: 68,255.33
Step by Step Solution
- Step 1: Write the proportion equation
87,688.14 : 121,021.49 = 49,455.54 : x - Step 2: Convert to fraction form
87,688.14/121,021.49 = 49,455.54/x - Step 3: Cross multiply
87,688.14x = 121,021.49 × 49,455.54 - Step 4: Simplify right side
87,688.14x = 5,985,182,892.28 - Step 5: Solve for x
x = 5,985,182,892.28/87,688.14 - Step 6: Final answer
x = 68,255.33
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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.