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Finding the Fourth Proportional to 66,609.24, 91,917.90 and 36,394.08

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Solution

The fourth proportional to 66,609.24, 91,917.90 and 36,394.08 is: 50,222.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.24 : 91,917.90 = 36,394.08 : x
  2. Step 2: Convert to fraction form
    66,609.24/91,917.90 = 36,394.08/x
  3. Step 3: Cross multiply
    66,609.24x = 91,917.90 × 36,394.08
  4. Step 4: Simplify right side
    66,609.24x = 3,345,267,406.03
  5. Step 5: Solve for x
    x = 3,345,267,406.03/66,609.24
  6. Step 6: Final answer
    x = 50,222.27

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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.