Finding the Fourth Proportional to 76,135.80, 114,203.70 and 20,731.80
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Solution
The fourth proportional to 76,135.80, 114,203.70 and 20,731.80 is: 31,097.70
Step by Step Solution
- Step 1: Write the proportion equation
76,135.80 : 114,203.70 = 20,731.80 : x - Step 2: Convert to fraction form
76,135.80/114,203.70 = 20,731.80/x - Step 3: Cross multiply
76,135.80x = 114,203.70 × 20,731.80 - Step 4: Simplify right side
76,135.80x = 2,367,648,267.66 - Step 5: Solve for x
x = 2,367,648,267.66/76,135.80 - Step 6: Final answer
x = 31,097.70
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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.