Finding the Fourth Proportional to 76,909.20, 115,277.40 and 39,454.80
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Solution
The fourth proportional to 76,909.20, 115,277.40 and 39,454.80 is: 59,137.88
Step by Step Solution
- Step 1: Write the proportion equation
76,909.20 : 115,277.40 = 39,454.80 : x - Step 2: Convert to fraction form
76,909.20/115,277.40 = 39,454.80/x - Step 3: Cross multiply
76,909.20x = 115,277.40 × 39,454.80 - Step 4: Simplify right side
76,909.20x = 4,548,246,761.52 - Step 5: Solve for x
x = 4,548,246,761.52/76,909.20 - Step 6: Final answer
x = 59,137.88
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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.