Finding the Fourth Proportional to 138,612.13, 191,284.88 and 74,949.91
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Solution
The fourth proportional to 138,612.13, 191,284.88 and 74,949.91 is: 103,430.95
Step by Step Solution
- Step 1: Write the proportion equation
138,612.13 : 191,284.88 = 74,949.91 : x - Step 2: Convert to fraction form
138,612.13/191,284.88 = 74,949.91/x - Step 3: Cross multiply
138,612.13x = 191,284.88 × 74,949.91 - Step 4: Simplify right side
138,612.13x = 14,336,784,540.36 - Step 5: Solve for x
x = 14,336,784,540.36/138,612.13 - Step 6: Final answer
x = 103,430.95
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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.