Finding the Fourth Proportional to 118,639.84, 163,785.92 and 86,129.68
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Solution
The fourth proportional to 118,639.84, 163,785.92 and 86,129.68 is: 118,904.65
Step by Step Solution
- Step 1: Write the proportion equation
118,639.84 : 163,785.92 = 86,129.68 : x - Step 2: Convert to fraction form
118,639.84/163,785.92 = 86,129.68/x - Step 3: Cross multiply
118,639.84x = 163,785.92 × 86,129.68 - Step 4: Simplify right side
118,639.84x = 14,106,828,878.11 - Step 5: Solve for x
x = 14,106,828,878.11/118,639.84 - Step 6: Final answer
x = 118,904.65
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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.