Finding the Fourth Proportional to 212,430.98, 318,643.50 and 86,070.18
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Solution
The fourth proportional to 212,430.98, 318,643.50 and 86,070.18 is: 129,104.07
Step by Step Solution
- Step 1: Write the proportion equation
212,430.98 : 318,643.50 = 86,070.18 : x - Step 2: Convert to fraction form
212,430.98/318,643.50 = 86,070.18/x - Step 3: Cross multiply
212,430.98x = 318,643.50 × 86,070.18 - Step 4: Simplify right side
212,430.98x = 27,425,703,400.83 - Step 5: Solve for x
x = 27,425,703,400.83/212,430.98 - Step 6: Final answer
x = 129,104.07
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.