Finding the Fourth Proportional to 155,903.10, 215,204.34 and 121,379.28
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Solution
The fourth proportional to 155,903.10, 215,204.34 and 121,379.28 is: 167,548.61
Step by Step Solution
- Step 1: Write the proportion equation
155,903.10 : 215,204.34 = 121,379.28 : x - Step 2: Convert to fraction form
155,903.10/215,204.34 = 121,379.28/x - Step 3: Cross multiply
155,903.10x = 215,204.34 × 121,379.28 - Step 4: Simplify right side
155,903.10x = 26,121,347,842.08 - Step 5: Solve for x
x = 26,121,347,842.08/155,903.10 - Step 6: Final answer
x = 167,548.61
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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.