Finding the Fourth Proportional to 105,621.61, 145,761.21 and 57,877.99
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Solution
The fourth proportional to 105,621.61, 145,761.21 and 57,877.99 is: 79,873.48
Step by Step Solution
- Step 1: Write the proportion equation
105,621.61 : 145,761.21 = 57,877.99 : x - Step 2: Convert to fraction form
105,621.61/145,761.21 = 57,877.99/x - Step 3: Cross multiply
105,621.61x = 145,761.21 × 57,877.99 - Step 4: Simplify right side
105,621.61x = 8,436,365,854.77 - Step 5: Solve for x
x = 8,436,365,854.77/105,621.61 - Step 6: Final answer
x = 79,873.48
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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.