Finding the Fourth Proportional to 90,780.21, 125,366.52 and 74,805.80
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Solution
The fourth proportional to 90,780.21, 125,366.52 and 74,805.80 is: 103,306.02
Step by Step Solution
- Step 1: Write the proportion equation
90,780.21 : 125,366.52 = 74,805.80 : x - Step 2: Convert to fraction form
90,780.21/125,366.52 = 74,805.80/x - Step 3: Cross multiply
90,780.21x = 125,366.52 × 74,805.80 - Step 4: Simplify right side
90,780.21x = 9,378,142,475.51 - Step 5: Solve for x
x = 9,378,142,475.51/90,780.21 - Step 6: Final answer
x = 103,306.02
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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.