Finding the Fourth Proportional to 121,412.06, 167,575.47 and 78,896.78
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Solution
The fourth proportional to 121,412.06, 167,575.47 and 78,896.78 is: 108,894.99
Step by Step Solution
- Step 1: Write the proportion equation
121,412.06 : 167,575.47 = 78,896.78 : x - Step 2: Convert to fraction form
121,412.06/167,575.47 = 78,896.78/x - Step 3: Cross multiply
121,412.06x = 167,575.47 × 78,896.78 - Step 4: Simplify right side
121,412.06x = 13,221,164,989.99 - Step 5: Solve for x
x = 13,221,164,989.99/121,412.06 - Step 6: Final answer
x = 108,894.99
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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.