Finding the Fourth Proportional to 125,636.80, 188,455.20 and 91,811.20
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Solution
The fourth proportional to 125,636.80, 188,455.20 and 91,811.20 is: 137,716.80
Step by Step Solution
- Step 1: Write the proportion equation
125,636.80 : 188,455.20 = 91,811.20 : x - Step 2: Convert to fraction form
125,636.80/188,455.20 = 91,811.20/x - Step 3: Cross multiply
125,636.80x = 188,455.20 × 91,811.20 - Step 4: Simplify right side
125,636.80x = 17,302,298,058.24 - Step 5: Solve for x
x = 17,302,298,058.24/125,636.80 - Step 6: Final answer
x = 137,716.80
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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.