Finding the Fourth Proportional to 134,905.68, 186,140.94 and 78,286.68
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Solution
The fourth proportional to 134,905.68, 186,140.94 and 78,286.68 is: 108,018.85
Step by Step Solution
- Step 1: Write the proportion equation
134,905.68 : 186,140.94 = 78,286.68 : x - Step 2: Convert to fraction form
134,905.68/186,140.94 = 78,286.68/x - Step 3: Cross multiply
134,905.68x = 186,140.94 × 78,286.68 - Step 4: Simplify right side
134,905.68x = 14,572,356,204.68 - Step 5: Solve for x
x = 14,572,356,204.68/134,905.68 - Step 6: Final answer
x = 108,018.85
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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.