Finding the Fourth Proportional to 84,612.30, 126,918.45 and 74,770.80
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Solution
The fourth proportional to 84,612.30, 126,918.45 and 74,770.80 is: 112,156.20
Step by Step Solution
- Step 1: Write the proportion equation
84,612.30 : 126,918.45 = 74,770.80 : x - Step 2: Convert to fraction form
84,612.30/126,918.45 = 74,770.80/x - Step 3: Cross multiply
84,612.30x = 126,918.45 × 74,770.80 - Step 4: Simplify right side
84,612.30x = 9,489,794,041.26 - Step 5: Solve for x
x = 9,489,794,041.26/84,612.30 - Step 6: Final answer
x = 112,156.20
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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.