Finding the Fourth Proportional to 87,121.13, 120,263.99 and 58,865.09
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Solution
The fourth proportional to 87,121.13, 120,263.99 and 58,865.09 is: 81,258.70
Step by Step Solution
- Step 1: Write the proportion equation
87,121.13 : 120,263.99 = 58,865.09 : x - Step 2: Convert to fraction form
87,121.13/120,263.99 = 58,865.09/x - Step 3: Cross multiply
87,121.13x = 120,263.99 × 58,865.09 - Step 4: Simplify right side
87,121.13x = 7,079,349,699.46 - Step 5: Solve for x
x = 7,079,349,699.46/87,121.13 - Step 6: Final answer
x = 81,258.70
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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.