Finding the Fourth Proportional to 85,687.47, 128,539.58 and 29,520.05
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Solution
The fourth proportional to 85,687.47, 128,539.58 and 29,520.05 is: 44,282.95
Step by Step Solution
- Step 1: Write the proportion equation
85,687.47 : 128,539.58 = 29,520.05 : x - Step 2: Convert to fraction form
85,687.47/128,539.58 = 29,520.05/x - Step 3: Cross multiply
85,687.47x = 128,539.58 × 29,520.05 - Step 4: Simplify right side
85,687.47x = 3,794,494,038.28 - Step 5: Solve for x
x = 3,794,494,038.28/85,687.47 - Step 6: Final answer
x = 44,282.95
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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.