Finding the Fourth Proportional to 105,178.23, 145,157.40 and 64,890.99
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Solution
The fourth proportional to 105,178.23, 145,157.40 and 64,890.99 is: 89,556.63
Step by Step Solution
- Step 1: Write the proportion equation
105,178.23 : 145,157.40 = 64,890.99 : x - Step 2: Convert to fraction form
105,178.23/145,157.40 = 64,890.99/x - Step 3: Cross multiply
105,178.23x = 145,157.40 × 64,890.99 - Step 4: Simplify right side
105,178.23x = 9,419,407,391.83 - Step 5: Solve for x
x = 9,419,407,391.83/105,178.23 - Step 6: Final answer
x = 89,556.63
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.