Finding the Fourth Proportional to 153,435.12, 211,740.36 and 86,368.56
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Solution
The fourth proportional to 153,435.12, 211,740.36 and 86,368.56 is: 119,188.55
Step by Step Solution
- Step 1: Write the proportion equation
153,435.12 : 211,740.36 = 86,368.56 : x - Step 2: Convert to fraction form
153,435.12/211,740.36 = 86,368.56/x - Step 3: Cross multiply
153,435.12x = 211,740.36 × 86,368.56 - Step 4: Simplify right side
153,435.12x = 18,287,709,987.08 - Step 5: Solve for x
x = 18,287,709,987.08/153,435.12 - Step 6: Final answer
x = 119,188.55
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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.