Finding the Fourth Proportional to 98,178.18, 135,487.80 and 55,736.70
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Solution
The fourth proportional to 98,178.18, 135,487.80 and 55,736.70 is: 76,917.73
Step by Step Solution
- Step 1: Write the proportion equation
98,178.18 : 135,487.80 = 55,736.70 : x - Step 2: Convert to fraction form
98,178.18/135,487.80 = 55,736.70/x - Step 3: Cross multiply
98,178.18x = 135,487.80 × 55,736.70 - Step 4: Simplify right side
98,178.18x = 7,551,642,862.26 - Step 5: Solve for x
x = 7,551,642,862.26/98,178.18 - Step 6: Final answer
x = 76,917.73
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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.