Finding the Fourth Proportional to 142,811.56, 212,940.55 and 138,888.02
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Solution
The fourth proportional to 142,811.56, 212,940.55 and 138,888.02 is: 207,090.32
Step by Step Solution
- Step 1: Write the proportion equation
142,811.56 : 212,940.55 = 138,888.02 : x - Step 2: Convert to fraction form
142,811.56/212,940.55 = 138,888.02/x - Step 3: Cross multiply
142,811.56x = 212,940.55 × 138,888.02 - Step 4: Simplify right side
142,811.56x = 29,574,891,367.21 - Step 5: Solve for x
x = 29,574,891,367.21/142,811.56 - Step 6: Final answer
x = 207,090.32
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.