Finding the Fourth Proportional to 70,285.86, 105,428.79 and 20,365.99
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Solution
The fourth proportional to 70,285.86, 105,428.79 and 20,365.99 is: 30,548.98
Step by Step Solution
- Step 1: Write the proportion equation
70,285.86 : 105,428.79 = 20,365.99 : x - Step 2: Convert to fraction form
70,285.86/105,428.79 = 20,365.99/x - Step 3: Cross multiply
70,285.86x = 105,428.79 × 20,365.99 - Step 4: Simplify right side
70,285.86x = 2,147,161,419.28 - Step 5: Solve for x
x = 2,147,161,419.28/70,285.86 - Step 6: Final answer
x = 30,548.98
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1.5x scale
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.