Finding the Fourth Proportional to 136,986.74, 189,041.09 and 76,557.36
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Solution
The fourth proportional to 136,986.74, 189,041.09 and 76,557.36 is: 105,648.82
Step by Step Solution
- Step 1: Write the proportion equation
136,986.74 : 189,041.09 = 76,557.36 : x - Step 2: Convert to fraction form
136,986.74/189,041.09 = 76,557.36/x - Step 3: Cross multiply
136,986.74x = 189,041.09 × 76,557.36 - Step 4: Simplify right side
136,986.74x = 14,472,486,399.14 - Step 5: Solve for x
x = 14,472,486,399.14/136,986.74 - Step 6: Final answer
x = 105,648.82
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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.