Finding the Fourth Proportional to 221,780.25, 306,056.75 and 121,178.25
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Solution
The fourth proportional to 221,780.25, 306,056.75 and 121,178.25 is: 167,225.99
Step by Step Solution
- Step 1: Write the proportion equation
221,780.25 : 306,056.75 = 121,178.25 : x - Step 2: Convert to fraction form
221,780.25/306,056.75 = 121,178.25/x - Step 3: Cross multiply
221,780.25x = 306,056.75 × 121,178.25 - Step 4: Simplify right side
221,780.25x = 37,087,420,759.80 - Step 5: Solve for x
x = 37,087,420,759.80/221,780.25 - Step 6: Final answer
x = 167,225.99
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1.5x scale
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.