Finding the Fourth Proportional to 138,903.80, 208,355.70 and 133,071.80
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Solution
The fourth proportional to 138,903.80, 208,355.70 and 133,071.80 is: 199,607.70
Step by Step Solution
- Step 1: Write the proportion equation
138,903.80 : 208,355.70 = 133,071.80 : x - Step 2: Convert to fraction form
138,903.80/208,355.70 = 133,071.80/x - Step 3: Cross multiply
138,903.80x = 208,355.70 × 133,071.80 - Step 4: Simplify right side
138,903.80x = 27,726,268,039.26 - Step 5: Solve for x
x = 27,726,268,039.26/138,903.80 - Step 6: Final answer
x = 199,607.70
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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.