Finding the Fourth Proportional to 130,421.20, 195,631.80 and 68,110.80
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Solution
The fourth proportional to 130,421.20, 195,631.80 and 68,110.80 is: 102,166.20
Step by Step Solution
- Step 1: Write the proportion equation
130,421.20 : 195,631.80 = 68,110.80 : x - Step 2: Convert to fraction form
130,421.20/195,631.80 = 68,110.80/x - Step 3: Cross multiply
130,421.20x = 195,631.80 × 68,110.80 - Step 4: Simplify right side
130,421.20x = 13,324,638,403.44 - Step 5: Solve for x
x = 13,324,638,403.44/130,421.20 - Step 6: Final answer
x = 102,166.20
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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.