Finding the Fourth Proportional to 107,638.80, 161,458.20 and 73,813.20
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Solution
The fourth proportional to 107,638.80, 161,458.20 and 73,813.20 is: 110,719.80
Step by Step Solution
- Step 1: Write the proportion equation
107,638.80 : 161,458.20 = 73,813.20 : x - Step 2: Convert to fraction form
107,638.80/161,458.20 = 73,813.20/x - Step 3: Cross multiply
107,638.80x = 161,458.20 × 73,813.20 - Step 4: Simplify right side
107,638.80x = 11,917,746,408.24 - Step 5: Solve for x
x = 11,917,746,408.24/107,638.80 - Step 6: Final answer
x = 110,719.80
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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.