Finding the Fourth Proportional to 312,129.64, 430,735.80 and 168,886.54
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Solution
The fourth proportional to 312,129.64, 430,735.80 and 168,886.54 is: 233,061.75
Step by Step Solution
- Step 1: Write the proportion equation
312,129.64 : 430,735.80 = 168,886.54 : x - Step 2: Convert to fraction form
312,129.64/430,735.80 = 168,886.54/x - Step 3: Cross multiply
312,129.64x = 430,735.80 × 168,886.54 - Step 4: Simplify right side
312,129.64x = 72,745,478,916.13 - Step 5: Solve for x
x = 72,745,478,916.13/312,129.64 - Step 6: Final answer
x = 233,061.75
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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.