Finding the Fourth Proportional to 115,347.80, 173,021.70 and 53,139.80
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Solution
The fourth proportional to 115,347.80, 173,021.70 and 53,139.80 is: 79,709.70
Step by Step Solution
- Step 1: Write the proportion equation
115,347.80 : 173,021.70 = 53,139.80 : x - Step 2: Convert to fraction form
115,347.80/173,021.70 = 53,139.80/x - Step 3: Cross multiply
115,347.80x = 173,021.70 × 53,139.80 - Step 4: Simplify right side
115,347.80x = 9,194,338,533.66 - Step 5: Solve for x
x = 9,194,338,533.66/115,347.80 - Step 6: Final answer
x = 79,709.70
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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.