Finding the Fourth Proportional to 122,153.19, 168,580.74 and 76,869.98
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Solution
The fourth proportional to 122,153.19, 168,580.74 and 76,869.98 is: 106,086.45
Step by Step Solution
- Step 1: Write the proportion equation
122,153.19 : 168,580.74 = 76,869.98 : x - Step 2: Convert to fraction form
122,153.19/168,580.74 = 76,869.98/x - Step 3: Cross multiply
122,153.19x = 168,580.74 × 76,869.98 - Step 4: Simplify right side
122,153.19x = 12,958,798,489.40 - Step 5: Solve for x
x = 12,958,798,489.40/122,153.19 - Step 6: Final answer
x = 106,086.45
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1.5x scale
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.