Finding the Fourth Proportional to 99,478.12, 137,330.52 and 76,766.08
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Solution
The fourth proportional to 99,478.12, 137,330.52 and 76,766.08 is: 105,976.33
Step by Step Solution
- Step 1: Write the proportion equation
99,478.12 : 137,330.52 = 76,766.08 : x - Step 2: Convert to fraction form
99,478.12/137,330.52 = 76,766.08/x - Step 3: Cross multiply
99,478.12x = 137,330.52 × 76,766.08 - Step 4: Simplify right side
99,478.12x = 10,542,325,684.76 - Step 5: Solve for x
x = 10,542,325,684.76/99,478.12 - Step 6: Final answer
x = 105,976.33
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1.5x scale
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.