Finding the Fourth Proportional to 90,949.60, 135,810.68 and 74,342.08
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Solution
The fourth proportional to 90,949.60, 135,810.68 and 74,342.08 is: 111,011.47
Step by Step Solution
- Step 1: Write the proportion equation
90,949.60 : 135,810.68 = 74,342.08 : x - Step 2: Convert to fraction form
90,949.60/135,810.68 = 74,342.08/x - Step 3: Cross multiply
90,949.60x = 135,810.68 × 74,342.08 - Step 4: Simplify right side
90,949.60x = 10,096,448,437.41 - Step 5: Solve for x
x = 10,096,448,437.41/90,949.60 - Step 6: Final answer
x = 111,011.47
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.