Finding the Fourth Proportional to 121,312.43, 167,408.91 and 66,122.23
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Solution
The fourth proportional to 121,312.43, 167,408.91 and 66,122.23 is: 91,247.45
Step by Step Solution
- Step 1: Write the proportion equation
121,312.43 : 167,408.91 = 66,122.23 : x - Step 2: Convert to fraction form
121,312.43/167,408.91 = 66,122.23/x - Step 3: Cross multiply
121,312.43x = 167,408.91 × 66,122.23 - Step 4: Simplify right side
121,312.43x = 11,069,449,614.02 - Step 5: Solve for x
x = 11,069,449,614.02/121,312.43 - Step 6: Final answer
x = 91,247.45
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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.