Finding the Fourth Proportional to 136,985.99, 189,040.05 and 76,556.61
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Solution
The fourth proportional to 136,985.99, 189,040.05 and 76,556.61 is: 105,647.78
Step by Step Solution
- Step 1: Write the proportion equation
136,985.99 : 189,040.05 = 76,556.61 : x - Step 2: Convert to fraction form
136,985.99/189,040.05 = 76,556.61/x - Step 3: Cross multiply
136,985.99x = 189,040.05 × 76,556.61 - Step 4: Simplify right side
136,985.99x = 14,472,265,382.23 - Step 5: Solve for x
x = 14,472,265,382.23/136,985.99 - Step 6: Final answer
x = 105,647.78
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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.