Finding the Fourth Proportional to 93,070.84, 128,439.12 and 57,239.68
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Solution
The fourth proportional to 93,070.84, 128,439.12 and 57,239.68 is: 78,991.60
Step by Step Solution
- Step 1: Write the proportion equation
93,070.84 : 128,439.12 = 57,239.68 : x - Step 2: Convert to fraction form
93,070.84/128,439.12 = 57,239.68/x - Step 3: Cross multiply
93,070.84x = 128,439.12 × 57,239.68 - Step 4: Simplify right side
93,070.84x = 7,351,814,128.28 - Step 5: Solve for x
x = 7,351,814,128.28/93,070.84 - Step 6: Final answer
x = 78,991.60
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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.