Finding the Fourth Proportional to 77,020.11, 115,434.74 and 43,638.99
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Solution
The fourth proportional to 77,020.11, 115,434.74 and 43,638.99 is: 65,404.42
Step by Step Solution
- Step 1: Write the proportion equation
77,020.11 : 115,434.74 = 43,638.99 : x - Step 2: Convert to fraction form
77,020.11/115,434.74 = 43,638.99/x - Step 3: Cross multiply
77,020.11x = 115,434.74 × 43,638.99 - Step 4: Simplify right side
77,020.11x = 5,037,455,246.32 - Step 5: Solve for x
x = 5,037,455,246.32/77,020.11 - Step 6: Final answer
x = 65,404.42
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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.