Finding the Fourth Proportional to 119,129.86, 163,876.80 and 99,643.96
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Solution
The fourth proportional to 119,129.86, 163,876.80 and 99,643.96 is: 137,071.71
Step by Step Solution
- Step 1: Write the proportion equation
119,129.86 : 163,876.80 = 99,643.96 : x - Step 2: Convert to fraction form
119,129.86/163,876.80 = 99,643.96/x - Step 3: Cross multiply
119,129.86x = 163,876.80 × 99,643.96 - Step 4: Simplify right side
119,129.86x = 16,329,333,304.13 - Step 5: Solve for x
x = 16,329,333,304.13/119,129.86 - Step 6: Final answer
x = 137,071.71
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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.