Finding the Fourth Proportional to 136,973.09, 189,026.90 and 76,543.87
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Solution
The fourth proportional to 136,973.09, 189,026.90 and 76,543.87 is: 105,632.80
Step by Step Solution
- Step 1: Write the proportion equation
136,973.09 : 189,026.90 = 76,543.87 : x - Step 2: Convert to fraction form
136,973.09/189,026.90 = 76,543.87/x - Step 3: Cross multiply
136,973.09x = 189,026.90 × 76,543.87 - Step 4: Simplify right side
136,973.09x = 14,468,850,460.10 - Step 5: Solve for x
x = 14,468,850,460.10/136,973.09 - Step 6: Final answer
x = 105,632.80
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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.