Finding the Fourth Proportional to 80,939.80, 121,409.70 and 51,415.30
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Solution
The fourth proportional to 80,939.80, 121,409.70 and 51,415.30 is: 77,122.95
Step by Step Solution
- Step 1: Write the proportion equation
80,939.80 : 121,409.70 = 51,415.30 : x - Step 2: Convert to fraction form
80,939.80/121,409.70 = 51,415.30/x - Step 3: Cross multiply
80,939.80x = 121,409.70 × 51,415.30 - Step 4: Simplify right side
80,939.80x = 6,242,316,148.41 - Step 5: Solve for x
x = 6,242,316,148.41/80,939.80 - Step 6: Final answer
x = 77,122.95
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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.