Finding the Fourth Proportional to 155,749.49, 215,027.66 and 102,128.03
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Solution
The fourth proportional to 155,749.49, 215,027.66 and 102,128.03 is: 140,997.90
Step by Step Solution
- Step 1: Write the proportion equation
155,749.49 : 215,027.66 = 102,128.03 : x - Step 2: Convert to fraction form
155,749.49/215,027.66 = 102,128.03/x - Step 3: Cross multiply
155,749.49x = 215,027.66 × 102,128.03 - Step 4: Simplify right side
155,749.49x = 21,960,350,491.49 - Step 5: Solve for x
x = 21,960,350,491.49/155,749.49 - Step 6: Final answer
x = 140,997.90
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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.