Finding the Fourth Proportional to 151,985.72, 209,765.81 and 102,905.08
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Solution
The fourth proportional to 151,985.72, 209,765.81 and 102,905.08 is: 142,026.29
Step by Step Solution
- Step 1: Write the proportion equation
151,985.72 : 209,765.81 = 102,905.08 : x - Step 2: Convert to fraction form
151,985.72/209,765.81 = 102,905.08/x - Step 3: Cross multiply
151,985.72x = 209,765.81 × 102,905.08 - Step 4: Simplify right side
151,985.72x = 21,585,967,459.31 - Step 5: Solve for x
x = 21,585,967,459.31/151,985.72 - Step 6: Final answer
x = 142,026.29
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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.