Finding the Fourth Proportional to 101,512.15, 139,993.67 and 87,167.09
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Solution
The fourth proportional to 101,512.15, 139,993.67 and 87,167.09 is: 120,210.65
Step by Step Solution
- Step 1: Write the proportion equation
101,512.15 : 139,993.67 = 87,167.09 : x - Step 2: Convert to fraction form
101,512.15/139,993.67 = 87,167.09/x - Step 3: Cross multiply
101,512.15x = 139,993.67 × 87,167.09 - Step 4: Simplify right side
101,512.15x = 12,202,841,400.22 - Step 5: Solve for x
x = 12,202,841,400.22/101,512.15 - Step 6: Final answer
x = 120,210.65
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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.