Finding the Fourth Proportional to 138,620.19, 191,294.96 and 74,957.70
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Solution
The fourth proportional to 138,620.19, 191,294.96 and 74,957.70 is: 103,441.14
Step by Step Solution
- Step 1: Write the proportion equation
138,620.19 : 191,294.96 = 74,957.70 : x - Step 2: Convert to fraction form
138,620.19/191,294.96 = 74,957.70/x - Step 3: Cross multiply
138,620.19x = 191,294.96 × 74,957.70 - Step 4: Simplify right side
138,620.19x = 14,339,029,848.40 - Step 5: Solve for x
x = 14,339,029,848.40/138,620.19 - Step 6: Final answer
x = 103,441.14
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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.