Finding the Fourth Proportional to 126,261.18, 189,437.33 and 78,173.83
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Solution
The fourth proportional to 126,261.18, 189,437.33 and 78,173.83 is: 117,288.95
Step by Step Solution
- Step 1: Write the proportion equation
126,261.18 : 189,437.33 = 78,173.83 : x - Step 2: Convert to fraction form
126,261.18/189,437.33 = 78,173.83/x - Step 3: Cross multiply
126,261.18x = 189,437.33 × 78,173.83 - Step 4: Simplify right side
126,261.18x = 14,809,041,240.20 - Step 5: Solve for x
x = 14,809,041,240.20/126,261.18 - Step 6: Final answer
x = 117,288.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.