Finding the Fourth Proportional to 155,390.79, 214,455.87 and 90,879.75
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Solution
The fourth proportional to 155,390.79, 214,455.87 and 90,879.75 is: 125,423.75
Step by Step Solution
- Step 1: Write the proportion equation
155,390.79 : 214,455.87 = 90,879.75 : x - Step 2: Convert to fraction form
155,390.79/214,455.87 = 90,879.75/x - Step 3: Cross multiply
155,390.79x = 214,455.87 × 90,879.75 - Step 4: Simplify right side
155,390.79x = 19,489,695,851.63 - Step 5: Solve for x
x = 19,489,695,851.63/155,390.79 - Step 6: Final answer
x = 125,423.75
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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.