Finding the Fourth Proportional to 221,789.21, 306,069.06 and 121,187.21
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Solution
The fourth proportional to 221,789.21, 306,069.06 and 121,187.21 is: 167,238.32
Step by Step Solution
- Step 1: Write the proportion equation
221,789.21 : 306,069.06 = 121,187.21 : x - Step 2: Convert to fraction form
221,789.21/306,069.06 = 121,187.21/x - Step 3: Cross multiply
221,789.21x = 306,069.06 × 121,187.21 - Step 4: Simplify right side
221,789.21x = 37,091,655,448.72 - Step 5: Solve for x
x = 37,091,655,448.72/221,789.21 - Step 6: Final answer
x = 167,238.32
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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.