Finding the Fourth Proportional to 98,670.40, 135,979.12 and 71,400.32
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Solution
The fourth proportional to 98,670.40, 135,979.12 and 71,400.32 is: 98,397.82
Step by Step Solution
- Step 1: Write the proportion equation
98,670.40 : 135,979.12 = 71,400.32 : x - Step 2: Convert to fraction form
98,670.40/135,979.12 = 71,400.32/x - Step 3: Cross multiply
98,670.40x = 135,979.12 × 71,400.32 - Step 4: Simplify right side
98,670.40x = 9,708,952,681.32 - Step 5: Solve for x
x = 9,708,952,681.32/98,670.40 - Step 6: Final answer
x = 98,397.82
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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.