Finding the Fourth Proportional to 278,117.80, 417,176.70 and 91,129.30
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Solution
The fourth proportional to 278,117.80, 417,176.70 and 91,129.30 is: 136,693.95
Step by Step Solution
- Step 1: Write the proportion equation
278,117.80 : 417,176.70 = 91,129.30 : x - Step 2: Convert to fraction form
278,117.80/417,176.70 = 91,129.30/x - Step 3: Cross multiply
278,117.80x = 417,176.70 × 91,129.30 - Step 4: Simplify right side
278,117.80x = 38,017,020,647.31 - Step 5: Solve for x
x = 38,017,020,647.31/278,117.80 - Step 6: Final answer
x = 136,693.95
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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.