Finding the Fourth Proportional to 153,106.12, 211,303.92 and 85,129.84
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Solution
The fourth proportional to 153,106.12, 211,303.92 and 85,129.84 is: 117,488.90
Step by Step Solution
- Step 1: Write the proportion equation
153,106.12 : 211,303.92 = 85,129.84 : x - Step 2: Convert to fraction form
153,106.12/211,303.92 = 85,129.84/x - Step 3: Cross multiply
153,106.12x = 211,303.92 × 85,129.84 - Step 4: Simplify right side
153,106.12x = 17,988,268,900.97 - Step 5: Solve for x
x = 17,988,268,900.97/153,106.12 - Step 6: Final answer
x = 117,488.90
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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.