Finding the Fourth Proportional to 158,605.36, 218,878.20 and 86,984.75
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Solution
The fourth proportional to 158,605.36, 218,878.20 and 86,984.75 is: 120,040.50
Step by Step Solution
- Step 1: Write the proportion equation
158,605.36 : 218,878.20 = 86,984.75 : x - Step 2: Convert to fraction form
158,605.36/218,878.20 = 86,984.75/x - Step 3: Cross multiply
158,605.36x = 218,878.20 × 86,984.75 - Step 4: Simplify right side
158,605.36x = 19,039,066,054.65 - Step 5: Solve for x
x = 19,039,066,054.65/158,605.36 - Step 6: Final answer
x = 120,040.50
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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.