Finding the Fourth Proportional to 128,429.04, 177,250.88 and 73,970.74
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Solution
The fourth proportional to 128,429.04, 177,250.88 and 73,970.74 is: 102,090.45
Step by Step Solution
- Step 1: Write the proportion equation
128,429.04 : 177,250.88 = 73,970.74 : x - Step 2: Convert to fraction form
128,429.04/177,250.88 = 73,970.74/x - Step 3: Cross multiply
128,429.04x = 177,250.88 × 73,970.74 - Step 4: Simplify right side
128,429.04x = 13,111,378,759.25 - Step 5: Solve for x
x = 13,111,378,759.25/128,429.04 - Step 6: Final answer
x = 102,090.45
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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.