Finding the Fourth Proportional to 81,177.40, 121,766.10 and 53,183.80
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Solution
The fourth proportional to 81,177.40, 121,766.10 and 53,183.80 is: 79,775.70
Step by Step Solution
- Step 1: Write the proportion equation
81,177.40 : 121,766.10 = 53,183.80 : x - Step 2: Convert to fraction form
81,177.40/121,766.10 = 53,183.80/x - Step 3: Cross multiply
81,177.40x = 121,766.10 × 53,183.80 - Step 4: Simplify right side
81,177.40x = 6,475,983,909.18 - Step 5: Solve for x
x = 6,475,983,909.18/81,177.40 - Step 6: Final answer
x = 79,775.70
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1.5x scale
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.