Finding the Fourth Proportional to 75,621.60, 113,432.40 and 69,919.20
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Solution
The fourth proportional to 75,621.60, 113,432.40 and 69,919.20 is: 104,878.80
Step by Step Solution
- Step 1: Write the proportion equation
75,621.60 : 113,432.40 = 69,919.20 : x - Step 2: Convert to fraction form
75,621.60/113,432.40 = 69,919.20/x - Step 3: Cross multiply
75,621.60x = 113,432.40 × 69,919.20 - Step 4: Simplify right side
75,621.60x = 7,931,102,662.08 - Step 5: Solve for x
x = 7,931,102,662.08/75,621.60 - Step 6: Final answer
x = 104,878.80
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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.