Finding the Fourth Proportional to 121,778.46, 167,945.10 and 101,428.08
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Solution
The fourth proportional to 121,778.46, 167,945.10 and 101,428.08 is: 139,879.82
Step by Step Solution
- Step 1: Write the proportion equation
121,778.46 : 167,945.10 = 101,428.08 : x - Step 2: Convert to fraction form
121,778.46/167,945.10 = 101,428.08/x - Step 3: Cross multiply
121,778.46x = 167,945.10 × 101,428.08 - Step 4: Simplify right side
121,778.46x = 17,034,349,038.41 - Step 5: Solve for x
x = 17,034,349,038.41/121,778.46 - Step 6: Final answer
x = 139,879.82
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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.