Finding the Fourth Proportional to 105,725.93, 145,905.99 and 57,980.99
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Solution
The fourth proportional to 105,725.93, 145,905.99 and 57,980.99 is: 80,016.07
Step by Step Solution
- Step 1: Write the proportion equation
105,725.93 : 145,905.99 = 57,980.99 : x - Step 2: Convert to fraction form
105,725.93/145,905.99 = 57,980.99/x - Step 3: Cross multiply
105,725.93x = 145,905.99 × 57,980.99 - Step 4: Simplify right side
105,725.93x = 8,459,773,747.13 - Step 5: Solve for x
x = 8,459,773,747.13/105,725.93 - Step 6: Final answer
x = 80,016.07
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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.