Finding the Fourth Proportional to 136,985.36, 189,039.18 and 76,555.96
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Solution
The fourth proportional to 136,985.36, 189,039.18 and 76,555.96 is: 105,646.88
Step by Step Solution
- Step 1: Write the proportion equation
136,985.36 : 189,039.18 = 76,555.96 : x - Step 2: Convert to fraction form
136,985.36/189,039.18 = 76,555.96/x - Step 3: Cross multiply
136,985.36x = 189,039.18 × 76,555.96 - Step 4: Simplify right side
136,985.36x = 14,472,075,902.51 - Step 5: Solve for x
x = 14,472,075,902.51/136,985.36 - Step 6: Final answer
x = 105,646.88
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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.