Finding the Fourth Proportional to 143,763.50, 198,394.99 and 79,235.06
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Solution
The fourth proportional to 143,763.50, 198,394.99 and 79,235.06 is: 109,345.12
Step by Step Solution
- Step 1: Write the proportion equation
143,763.50 : 198,394.99 = 79,235.06 : x - Step 2: Convert to fraction form
143,763.50/198,394.99 = 79,235.06/x - Step 3: Cross multiply
143,763.50x = 198,394.99 × 79,235.06 - Step 4: Simplify right side
143,763.50x = 15,719,837,746.29 - Step 5: Solve for x
x = 15,719,837,746.29/143,763.50 - Step 6: Final answer
x = 109,345.12
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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.