Finding the Fourth Proportional to 77,904.62, 107,689.99 and 69,490.14
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Solution
The fourth proportional to 77,904.62, 107,689.99 and 69,490.14 is: 96,058.39
Step by Step Solution
- Step 1: Write the proportion equation
77,904.62 : 107,689.99 = 69,490.14 : x - Step 2: Convert to fraction form
77,904.62/107,689.99 = 69,490.14/x - Step 3: Cross multiply
77,904.62x = 107,689.99 × 69,490.14 - Step 4: Simplify right side
77,904.62x = 7,483,392,034.43 - Step 5: Solve for x
x = 7,483,392,034.43/77,904.62 - Step 6: Final answer
x = 96,058.39
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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.