Finding the Fourth Proportional to 128,430.70, 192,646.65 and 45,324.70
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Solution
The fourth proportional to 128,430.70, 192,646.65 and 45,324.70 is: 67,987.26
Step by Step Solution
- Step 1: Write the proportion equation
128,430.70 : 192,646.65 = 45,324.70 : x - Step 2: Convert to fraction form
128,430.70/192,646.65 = 45,324.70/x - Step 3: Cross multiply
128,430.70x = 192,646.65 × 45,324.70 - Step 4: Simplify right side
128,430.70x = 8,731,651,617.26 - Step 5: Solve for x
x = 8,731,651,617.26/128,430.70 - Step 6: Final answer
x = 67,987.26
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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.