Finding the Fourth Proportional to 85,720.38, 128,588.99 and 29,553.09
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Solution
The fourth proportional to 85,720.38, 128,588.99 and 29,553.09 is: 44,332.53
Step by Step Solution
- Step 1: Write the proportion equation
85,720.38 : 128,588.99 = 29,553.09 : x - Step 2: Convert to fraction form
85,720.38/128,588.99 = 29,553.09/x - Step 3: Cross multiply
85,720.38x = 128,588.99 × 29,553.09 - Step 4: Simplify right side
85,720.38x = 3,800,201,364.50 - Step 5: Solve for x
x = 3,800,201,364.50/85,720.38 - Step 6: Final answer
x = 44,332.53
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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.