Finding the Fourth Proportional to 221,643.36, 305,868.96 and 121,041.36
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Solution
The fourth proportional to 221,643.36, 305,868.96 and 121,041.36 is: 167,037.69
Step by Step Solution
- Step 1: Write the proportion equation
221,643.36 : 305,868.96 = 121,041.36 : x - Step 2: Convert to fraction form
221,643.36/305,868.96 = 121,041.36/x - Step 3: Cross multiply
221,643.36x = 305,868.96 × 121,041.36 - Step 4: Simplify right side
221,643.36x = 37,022,794,900.19 - Step 5: Solve for x
x = 37,022,794,900.19/221,643.36 - Step 6: Final answer
x = 167,037.69
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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.