Finding the Fourth Proportional to 128,037.60, 176,682.43 and 74,313.94
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Solution
The fourth proportional to 128,037.60, 176,682.43 and 74,313.94 is: 102,547.75
Step by Step Solution
- Step 1: Write the proportion equation
128,037.60 : 176,682.43 = 74,313.94 : x - Step 2: Convert to fraction form
128,037.60/176,682.43 = 74,313.94/x - Step 3: Cross multiply
128,037.60x = 176,682.43 × 74,313.94 - Step 4: Simplify right side
128,037.60x = 13,129,967,502.07 - Step 5: Solve for x
x = 13,129,967,502.07/128,037.60 - Step 6: Final answer
x = 102,547.75
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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.