Finding the Fourth Proportional to 128,454.24, 177,326.36 and 74,719.68
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Solution
The fourth proportional to 128,454.24, 177,326.36 and 74,719.68 is: 103,147.77
Step by Step Solution
- Step 1: Write the proportion equation
128,454.24 : 177,326.36 = 74,719.68 : x - Step 2: Convert to fraction form
128,454.24/177,326.36 = 74,719.68/x - Step 3: Cross multiply
128,454.24x = 177,326.36 × 74,719.68 - Step 4: Simplify right side
128,454.24x = 13,249,768,874.76 - Step 5: Solve for x
x = 13,249,768,874.76/128,454.24 - Step 6: Final answer
x = 103,147.77
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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.