Finding the Fourth Proportional to 136,993.38, 189,038.21 and 76,555.63
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Solution
The fourth proportional to 136,993.38, 189,038.21 and 76,555.63 is: 105,639.70
Step by Step Solution
- Step 1: Write the proportion equation
136,993.38 : 189,038.21 = 76,555.63 : x - Step 2: Convert to fraction form
136,993.38/189,038.21 = 76,555.63/x - Step 3: Cross multiply
136,993.38x = 189,038.21 × 76,555.63 - Step 4: Simplify right side
136,993.38x = 14,471,939,114.14 - Step 5: Solve for x
x = 14,471,939,114.14/136,993.38 - Step 6: Final answer
x = 105,639.70
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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.