Finding the Fourth Proportional to 153,689.13, 212,085.99 and 84,778.43
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Solution
The fourth proportional to 153,689.13, 212,085.99 and 84,778.43 is: 116,991.46
Step by Step Solution
- Step 1: Write the proportion equation
153,689.13 : 212,085.99 = 84,778.43 : x - Step 2: Convert to fraction form
153,689.13/212,085.99 = 84,778.43/x - Step 3: Cross multiply
153,689.13x = 212,085.99 × 84,778.43 - Step 4: Simplify right side
153,689.13x = 17,980,316,196.77 - Step 5: Solve for x
x = 17,980,316,196.77/153,689.13 - Step 6: Final answer
x = 116,991.46
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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.