Finding the Fourth Proportional to 84,605.80, 126,908.70 and 79,421.80
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Solution
The fourth proportional to 84,605.80, 126,908.70 and 79,421.80 is: 119,132.70
Step by Step Solution
- Step 1: Write the proportion equation
84,605.80 : 126,908.70 = 79,421.80 : x - Step 2: Convert to fraction form
84,605.80/126,908.70 = 79,421.80/x - Step 3: Cross multiply
84,605.80x = 126,908.70 × 79,421.80 - Step 4: Simplify right side
84,605.80x = 10,079,317,389.66 - Step 5: Solve for x
x = 10,079,317,389.66/84,605.80 - Step 6: Final answer
x = 119,132.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.