Finding the Fourth Proportional to 129,605.53, 178,866.01 and 72,263.44
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Solution
The fourth proportional to 129,605.53, 178,866.01 and 72,263.44 is: 99,729.32
Step by Step Solution
- Step 1: Write the proportion equation
129,605.53 : 178,866.01 = 72,263.44 : x - Step 2: Convert to fraction form
129,605.53/178,866.01 = 72,263.44/x - Step 3: Cross multiply
129,605.53x = 178,866.01 × 72,263.44 - Step 4: Simplify right side
129,605.53x = 12,925,471,926.03 - Step 5: Solve for x
x = 12,925,471,926.03/129,605.53 - Step 6: Final answer
x = 99,729.32
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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.