Finding the Fourth Proportional to 85,781.52, 128,666.08 and 26,615.68
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Solution
The fourth proportional to 85,781.52, 128,666.08 and 26,615.68 is: 39,921.60
Step by Step Solution
- Step 1: Write the proportion equation
85,781.52 : 128,666.08 = 26,615.68 : x - Step 2: Convert to fraction form
85,781.52/128,666.08 = 26,615.68/x - Step 3: Cross multiply
85,781.52x = 128,666.08 × 26,615.68 - Step 4: Simplify right side
85,781.52x = 3,424,535,212.13 - Step 5: Solve for x
x = 3,424,535,212.13/85,781.52 - Step 6: Final answer
x = 39,921.60
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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.