Finding the Fourth Proportional to 138,919.20, 208,484.24 and 91,518.14
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Solution
The fourth proportional to 138,919.20, 208,484.24 and 91,518.14 is: 137,346.66
Step by Step Solution
- Step 1: Write the proportion equation
138,919.20 : 208,484.24 = 91,518.14 : x - Step 2: Convert to fraction form
138,919.20/208,484.24 = 91,518.14/x - Step 3: Cross multiply
138,919.20x = 208,484.24 × 91,518.14 - Step 4: Simplify right side
138,919.20x = 19,080,088,364.10 - Step 5: Solve for x
x = 19,080,088,364.10/138,919.20 - Step 6: Final answer
x = 137,346.66
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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.