Finding the Fourth Proportional to 71,699.68, 107,021.75 and 62,405.20
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Solution
The fourth proportional to 71,699.68, 107,021.75 and 62,405.20 is: 93,148.45
Step by Step Solution
- Step 1: Write the proportion equation
71,699.68 : 107,021.75 = 62,405.20 : x - Step 2: Convert to fraction form
71,699.68/107,021.75 = 62,405.20/x - Step 3: Cross multiply
71,699.68x = 107,021.75 × 62,405.20 - Step 4: Simplify right side
71,699.68x = 6,678,713,713.10 - Step 5: Solve for x
x = 6,678,713,713.10/71,699.68 - Step 6: Final answer
x = 93,148.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.