Finding the Fourth Proportional to 90,878.14, 125,432.51 and 58,991.68
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Solution
The fourth proportional to 90,878.14, 125,432.51 and 58,991.68 is: 81,421.94
Step by Step Solution
- Step 1: Write the proportion equation
90,878.14 : 125,432.51 = 58,991.68 : x - Step 2: Convert to fraction form
90,878.14/125,432.51 = 58,991.68/x - Step 3: Cross multiply
90,878.14x = 125,432.51 × 58,991.68 - Step 4: Simplify right side
90,878.14x = 7,399,474,491.52 - Step 5: Solve for x
x = 7,399,474,491.52/90,878.14 - Step 6: Final answer
x = 81,421.94
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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.