Finding the Fourth Proportional to 81,020.54, 121,355.84 and 79,037.66
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Solution
The fourth proportional to 81,020.54, 121,355.84 and 79,037.66 is: 118,385.80
Step by Step Solution
- Step 1: Write the proportion equation
81,020.54 : 121,355.84 = 79,037.66 : x - Step 2: Convert to fraction form
81,020.54/121,355.84 = 79,037.66/x - Step 3: Cross multiply
81,020.54x = 121,355.84 × 79,037.66 - Step 4: Simplify right side
81,020.54x = 9,591,681,211.75 - Step 5: Solve for x
x = 9,591,681,211.75/81,020.54 - Step 6: Final answer
x = 118,385.80
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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.