Finding the Fourth Proportional to 138,919.08, 191,690.00 and 87,841.70
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Solution
The fourth proportional to 138,919.08, 191,690.00 and 87,841.70 is: 121,209.95
Step by Step Solution
- Step 1: Write the proportion equation
138,919.08 : 191,690.00 = 87,841.70 : x - Step 2: Convert to fraction form
138,919.08/191,690.00 = 87,841.70/x - Step 3: Cross multiply
138,919.08x = 191,690.00 × 87,841.70 - Step 4: Simplify right side
138,919.08x = 16,838,375,370.64 - Step 5: Solve for x
x = 16,838,375,370.64/138,919.08 - Step 6: Final answer
x = 121,209.95
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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.