Finding the Fourth Proportional to 138,598.56, 191,265.99 and 78,169.08
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Solution
The fourth proportional to 138,598.56, 191,265.99 and 78,169.08 is: 107,873.32
Step by Step Solution
- Step 1: Write the proportion equation
138,598.56 : 191,265.99 = 78,169.08 : x - Step 2: Convert to fraction form
138,598.56/191,265.99 = 78,169.08/x - Step 3: Cross multiply
138,598.56x = 191,265.99 × 78,169.08 - Step 4: Simplify right side
138,598.56x = 14,951,086,473.59 - Step 5: Solve for x
x = 14,951,086,473.59/138,598.56 - Step 6: Final answer
x = 107,873.32
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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.