Finding the Fourth Proportional to 157,790.28, 217,749.12 and 86,170.08
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Solution
The fourth proportional to 157,790.28, 217,749.12 and 86,170.08 is: 118,913.91
Step by Step Solution
- Step 1: Write the proportion equation
157,790.28 : 217,749.12 = 86,170.08 : x - Step 2: Convert to fraction form
157,790.28/217,749.12 = 86,170.08/x - Step 3: Cross multiply
157,790.28x = 217,749.12 × 86,170.08 - Step 4: Simplify right side
157,790.28x = 18,763,459,090.33 - Step 5: Solve for x
x = 18,763,459,090.33/157,790.28 - Step 6: Final answer
x = 118,913.91
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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.