Finding the Fourth Proportional to 115,420.20, 173,130.30 and 76,021.80
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Solution
The fourth proportional to 115,420.20, 173,130.30 and 76,021.80 is: 114,032.70
Step by Step Solution
- Step 1: Write the proportion equation
115,420.20 : 173,130.30 = 76,021.80 : x - Step 2: Convert to fraction form
115,420.20/173,130.30 = 76,021.80/x - Step 3: Cross multiply
115,420.20x = 173,130.30 × 76,021.80 - Step 4: Simplify right side
115,420.20x = 13,161,677,040.54 - Step 5: Solve for x
x = 13,161,677,040.54/115,420.20 - Step 6: Final answer
x = 114,032.70
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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.