Finding the Fourth Proportional to 91,312.92, 136,949.13 and 28,122.66
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Solution
The fourth proportional to 91,312.92, 136,949.13 and 28,122.66 is: 42,177.75
Step by Step Solution
- Step 1: Write the proportion equation
91,312.92 : 136,949.13 = 28,122.66 : x - Step 2: Convert to fraction form
91,312.92/136,949.13 = 28,122.66/x - Step 3: Cross multiply
91,312.92x = 136,949.13 × 28,122.66 - Step 4: Simplify right side
91,312.92x = 3,851,373,820.29 - Step 5: Solve for x
x = 3,851,373,820.29/91,312.92 - Step 6: Final answer
x = 42,177.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.