Finding the Fourth Proportional to 92,979.07, 128,372.91 and 71,430.44
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Solution
The fourth proportional to 92,979.07, 128,372.91 and 71,430.44 is: 98,621.48
Step by Step Solution
- Step 1: Write the proportion equation
92,979.07 : 128,372.91 = 71,430.44 : x - Step 2: Convert to fraction form
92,979.07/128,372.91 = 71,430.44/x - Step 3: Cross multiply
92,979.07x = 128,372.91 × 71,430.44 - Step 4: Simplify right side
92,979.07x = 9,169,733,445.38 - Step 5: Solve for x
x = 9,169,733,445.38/92,979.07 - Step 6: Final answer
x = 98,621.48
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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.