Finding the Fourth Proportional to 129,311.16, 178,447.68 and 72,722.53
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Solution
The fourth proportional to 129,311.16, 178,447.68 and 72,722.53 is: 100,356.12
Step by Step Solution
- Step 1: Write the proportion equation
129,311.16 : 178,447.68 = 72,722.53 : x - Step 2: Convert to fraction form
129,311.16/178,447.68 = 72,722.53/x - Step 3: Cross multiply
129,311.16x = 178,447.68 × 72,722.53 - Step 4: Simplify right side
129,311.16x = 12,977,166,762.23 - Step 5: Solve for x
x = 12,977,166,762.23/129,311.16 - Step 6: Final answer
x = 100,356.12
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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.