Finding the Fourth Proportional to 218,958.64, 302,171.89 and 138,356.75
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Solution
The fourth proportional to 218,958.64, 302,171.89 and 138,356.75 is: 190,937.99
Step by Step Solution
- Step 1: Write the proportion equation
218,958.64 : 302,171.89 = 138,356.75 : x - Step 2: Convert to fraction form
218,958.64/302,171.89 = 138,356.75/x - Step 3: Cross multiply
218,958.64x = 302,171.89 × 138,356.75 - Step 4: Simplify right side
218,958.64x = 41,807,521,051.30 - Step 5: Solve for x
x = 41,807,521,051.30/218,958.64 - Step 6: Final answer
x = 190,937.99
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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.