Finding the Fourth Proportional to 76,438.80, 114,658.20 and 74,251.80
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Solution
The fourth proportional to 76,438.80, 114,658.20 and 74,251.80 is: 111,377.70
Step by Step Solution
- Step 1: Write the proportion equation
76,438.80 : 114,658.20 = 74,251.80 : x - Step 2: Convert to fraction form
76,438.80/114,658.20 = 74,251.80/x - Step 3: Cross multiply
76,438.80x = 114,658.20 × 74,251.80 - Step 4: Simplify right side
76,438.80x = 8,513,577,734.76 - Step 5: Solve for x
x = 8,513,577,734.76/76,438.80 - Step 6: Final answer
x = 111,377.70
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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.