Finding the Fourth Proportional to 153,419.80, 211,721.70 and 86,351.80
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Solution
The fourth proportional to 153,419.80, 211,721.70 and 86,351.80 is: 119,166.82
Step by Step Solution
- Step 1: Write the proportion equation
153,419.80 : 211,721.70 = 86,351.80 : x - Step 2: Convert to fraction form
153,419.80/211,721.70 = 86,351.80/x - Step 3: Cross multiply
153,419.80x = 211,721.70 × 86,351.80 - Step 4: Simplify right side
153,419.80x = 18,282,549,894.06 - Step 5: Solve for x
x = 18,282,549,894.06/153,419.80 - Step 6: Final answer
x = 119,166.82
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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.