Finding the Fourth Proportional to 128,501.64, 177,316.61 and 71,136.63
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Solution
The fourth proportional to 128,501.64, 177,316.61 and 71,136.63 is: 98,159.88
Step by Step Solution
- Step 1: Write the proportion equation
128,501.64 : 177,316.61 = 71,136.63 : x - Step 2: Convert to fraction form
128,501.64/177,316.61 = 71,136.63/x - Step 3: Cross multiply
128,501.64x = 177,316.61 × 71,136.63 - Step 4: Simplify right side
128,501.64x = 12,613,705,722.74 - Step 5: Solve for x
x = 12,613,705,722.74/128,501.64 - Step 6: Final answer
x = 98,159.88
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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.