Finding the Fourth Proportional to 221,921.28, 306,251.68 and 121,319.36
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Solution
The fourth proportional to 221,921.28, 306,251.68 and 121,319.36 is: 167,420.89
Step by Step Solution
- Step 1: Write the proportion equation
221,921.28 : 306,251.68 = 121,319.36 : x - Step 2: Convert to fraction form
221,921.28/306,251.68 = 121,319.36/x - Step 3: Cross multiply
221,921.28x = 306,251.68 × 121,319.36 - Step 4: Simplify right side
221,921.28x = 37,154,257,816.52 - Step 5: Solve for x
x = 37,154,257,816.52/221,921.28 - Step 6: Final answer
x = 167,420.89
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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.