Finding the Fourth Proportional to 76,720.10, 105,873.44 and 42,728.99
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Solution
The fourth proportional to 76,720.10, 105,873.44 and 42,728.99 is: 58,965.83
Step by Step Solution
- Step 1: Write the proportion equation
76,720.10 : 105,873.44 = 42,728.99 : x - Step 2: Convert to fraction form
76,720.10/105,873.44 = 42,728.99/x - Step 3: Cross multiply
76,720.10x = 105,873.44 × 42,728.99 - Step 4: Simplify right side
76,720.10x = 4,523,864,416.01 - Step 5: Solve for x
x = 4,523,864,416.01/76,720.10 - Step 6: Final answer
x = 58,965.83
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1.5x scale
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.