Finding the Fourth Proportional to 154,387.20, 213,058.14 and 86,403.63
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Solution
The fourth proportional to 154,387.20, 213,058.14 and 86,403.63 is: 119,239.14
Step by Step Solution
- Step 1: Write the proportion equation
154,387.20 : 213,058.14 = 86,403.63 : x - Step 2: Convert to fraction form
154,387.20/213,058.14 = 86,403.63/x - Step 3: Cross multiply
154,387.20x = 213,058.14 × 86,403.63 - Step 4: Simplify right side
154,387.20x = 18,408,996,697.05 - Step 5: Solve for x
x = 18,408,996,697.05/154,387.20 - Step 6: Final answer
x = 119,239.14
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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.