Finding the Fourth Proportional to 74,430.20, 102,714.17 and 40,438.68
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Solution
The fourth proportional to 74,430.20, 102,714.17 and 40,438.68 is: 55,805.65
Step by Step Solution
- Step 1: Write the proportion equation
74,430.20 : 102,714.17 = 40,438.68 : x - Step 2: Convert to fraction form
74,430.20/102,714.17 = 40,438.68/x - Step 3: Cross multiply
74,430.20x = 102,714.17 × 40,438.68 - Step 4: Simplify right side
74,430.20x = 4,153,625,452.10 - Step 5: Solve for x
x = 4,153,625,452.10/74,430.20 - Step 6: Final answer
x = 55,805.65
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1.5x scale
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.