Finding the Fourth Proportional to 85,875.99, 128,703.10 and 38,456.43
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Solution
The fourth proportional to 85,875.99, 128,703.10 and 38,456.43 is: 57,634.99
Step by Step Solution
- Step 1: Write the proportion equation
85,875.99 : 128,703.10 = 38,456.43 : x - Step 2: Convert to fraction form
85,875.99/128,703.10 = 38,456.43/x - Step 3: Cross multiply
85,875.99x = 128,703.10 × 38,456.43 - Step 4: Simplify right side
85,875.99x = 4,949,461,755.93 - Step 5: Solve for x
x = 4,949,461,755.93/85,875.99 - Step 6: Final answer
x = 57,634.99
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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.