Finding the Fourth Proportional to 85,781.99, 118,423.95 and 66,618.77
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Solution
The fourth proportional to 85,781.99, 118,423.95 and 66,618.77 is: 91,968.70
Step by Step Solution
- Step 1: Write the proportion equation
85,781.99 : 118,423.95 = 66,618.77 : x - Step 2: Convert to fraction form
85,781.99/118,423.95 = 66,618.77/x - Step 3: Cross multiply
85,781.99x = 118,423.95 × 66,618.77 - Step 4: Simplify right side
85,781.99x = 7,889,257,887.54 - Step 5: Solve for x
x = 7,889,257,887.54/85,781.99 - Step 6: Final answer
x = 91,968.70
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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.