Finding the Fourth Proportional to 126,438.60, 174,478.26 and 78,690.44
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Solution
The fourth proportional to 126,438.60, 174,478.26 and 78,690.44 is: 108,588.45
Step by Step Solution
- Step 1: Write the proportion equation
126,438.60 : 174,478.26 = 78,690.44 : x - Step 2: Convert to fraction form
126,438.60/174,478.26 = 78,690.44/x - Step 3: Cross multiply
126,438.60x = 174,478.26 × 78,690.44 - Step 4: Simplify right side
126,438.60x = 13,729,771,049.83 - Step 5: Solve for x
x = 13,729,771,049.83/126,438.60 - Step 6: Final answer
x = 108,588.45
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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.