Finding the Fourth Proportional to 154,970.69, 213,842.44 and 86,972.07
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Solution
The fourth proportional to 154,970.69, 213,842.44 and 86,972.07 is: 120,011.85
Step by Step Solution
- Step 1: Write the proportion equation
154,970.69 : 213,842.44 = 86,972.07 : x - Step 2: Convert to fraction form
154,970.69/213,842.44 = 86,972.07/x - Step 3: Cross multiply
154,970.69x = 213,842.44 × 86,972.07 - Step 4: Simplify right side
154,970.69x = 18,598,318,374.01 - Step 5: Solve for x
x = 18,598,318,374.01/154,970.69 - Step 6: Final answer
x = 120,011.85
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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.