Finding the Fourth Proportional to 153,415.12, 211,710.36 and 86,347.12
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Solution
The fourth proportional to 153,415.12, 211,710.36 and 86,347.12 is: 119,157.62
Step by Step Solution
- Step 1: Write the proportion equation
153,415.12 : 211,710.36 = 86,347.12 : x - Step 2: Convert to fraction form
153,415.12/211,710.36 = 86,347.12/x - Step 3: Cross multiply
153,415.12x = 211,710.36 × 86,347.12 - Step 4: Simplify right side
153,415.12x = 18,280,579,860.16 - Step 5: Solve for x
x = 18,280,579,860.16/153,415.12 - Step 6: Final answer
x = 119,157.62
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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.