Finding the Fourth Proportional to 210,312.18, 290,136.06 and 129,743.10
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Solution
The fourth proportional to 210,312.18, 290,136.06 and 129,743.10 is: 178,987.03
Step by Step Solution
- Step 1: Write the proportion equation
210,312.18 : 290,136.06 = 129,743.10 : x - Step 2: Convert to fraction form
210,312.18/290,136.06 = 129,743.10/x - Step 3: Cross multiply
210,312.18x = 290,136.06 × 129,743.10 - Step 4: Simplify right side
210,312.18x = 37,643,151,846.19 - Step 5: Solve for x
x = 37,643,151,846.19/210,312.18 - Step 6: Final answer
x = 178,987.03
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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.