Finding the Fourth Proportional to 138,503.96, 191,135.45 and 74,841.75
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Solution
The fourth proportional to 138,503.96, 191,135.45 and 74,841.75 is: 103,281.61
Step by Step Solution
- Step 1: Write the proportion equation
138,503.96 : 191,135.45 = 74,841.75 : x - Step 2: Convert to fraction form
138,503.96/191,135.45 = 74,841.75/x - Step 3: Cross multiply
138,503.96x = 191,135.45 × 74,841.75 - Step 4: Simplify right side
138,503.96x = 14,304,911,565.04 - Step 5: Solve for x
x = 14,304,911,565.04/138,503.96 - Step 6: Final answer
x = 103,281.61
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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.