Finding the Fourth Proportional to 101,482.68, 139,953.56 and 87,138.01
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Solution
The fourth proportional to 101,482.68, 139,953.56 and 87,138.01 is: 120,170.99
Step by Step Solution
- Step 1: Write the proportion equation
101,482.68 : 139,953.56 = 87,138.01 : x - Step 2: Convert to fraction form
101,482.68/139,953.56 = 87,138.01/x - Step 3: Cross multiply
101,482.68x = 139,953.56 × 87,138.01 - Step 4: Simplify right side
101,482.68x = 12,195,274,450.07 - Step 5: Solve for x
x = 12,195,274,450.07/101,482.68 - Step 6: Final answer
x = 120,170.99
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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.