Finding the Fourth Proportional to 153,707.64, 212,116.10 and 85,724.70
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Solution
The fourth proportional to 153,707.64, 212,116.10 and 85,724.70 is: 118,299.84
Step by Step Solution
- Step 1: Write the proportion equation
153,707.64 : 212,116.10 = 85,724.70 : x - Step 2: Convert to fraction form
153,707.64/212,116.10 = 85,724.70/x - Step 3: Cross multiply
153,707.64x = 212,116.10 × 85,724.70 - Step 4: Simplify right side
153,707.64x = 18,183,588,609.05 - Step 5: Solve for x
x = 18,183,588,609.05/153,707.64 - Step 6: Final answer
x = 118,299.84
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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.